Lbz clogged cat Right now I am thinking of removing the cat with an eliminator pipe so that it can be re-installed easily if need be. Here are the symptoms of clogged catalytic converter and how to fix it. ?? 🤬 : Shoot - Shovel - STFU. Pulling the vail and Loveland passes in Co on I70 the truck had engine light come on with "clean exhaust filter see owners manual now" and Nov 8, 2013 · Get rid of them. A buddy of mine has one with nothing but exhaust and it smokes like a sidewalk hooker, I was just wondering to make sure that there is nothing clogged up or any issues that I don’t know about with this truck. 5" pipe; spending as little as possible. By the time you add in all the adapters and clamps it was $120 Jan 13, 2009 · I live in Kelso. Nov 6, 2008 · We have a 2002 duramax with a banks power upfit device and aftermarket programming,vehicle will start ok cold and run ok with no misfire,balance rates on injectors are ok,dropped exhaust found no obstruction,air inlet and cooler are ok,concern is LOW POWER, ACTS LIKE A CLOGGED CAT CONVERTER, fuel psi is ok and can ramp to 21000 psi, boost psi will only go to 21 psi max cant get the spec of 33 Nov 17, 2011 · Hey my turbo is making zero noise (I can't tell if the vanes are even opening or closing), could I have a clogged vane? Driving everyday I usually have about an 1 hr of 0-30mph traffic on the way home so yes my truck gets to idle a lot. Recognizing Symptoms of a Clogged Catalytic Converter If you suspect that your car’s catalytic converter is clogged, it’s important to recognize the symptoms so that you can take action before the problem gets worse. May 28, 2013 · I have a question for all you guys I just bought a Cat delete pipe for my LBZ and I am wondering how to get the kitty out of there without curing it, in Mar 2, 2011 · 07 LBZ 4x4 1LT Banks Speedbrake, EFI Live, 20" American Eagle 507s, 33x12. EGR delete, 4 inch turbo back. 5 LLY SC 2wd 2006 LBZ CC 4wd TTS rods, camshaft, heads and pistons in the motor and a TTS Converter and transmission upgrade kit in the transmission Reply Like lakingslayer Cats are known for their independent and aloof nature, but they are also susceptible to various health issues, including blocked tear ducts. When ever I really try and get on the throttle and push it, sthe truck throws me a code P0087. Mar 21, 2023 · Explore the exceptional features of the Duramax engine, known for its unparalleled power and reliability. If thats good Id lean towards completely clogged cat (could happen though unlikely). I have an 07 stock except CAI an cat fuel filter kit. Improve performance and fuel efficiency with Flashark DPF & Cat Delete Pipes. And I cleaned orrfice tube yesterday. If its good Id check ignition spark. Even though the turbo was slightly downsized, horsepower and torque were increased to 360 and 650 respectively. 6). 2016 GMC Sierra 2500HD SLT 4x4 LML CCSB 2006 GMC Sierra 2500HD SLT 4x4 LBZ CCSB Sold Reply Save Like PlumCrazyCustom · #7 ·Feb 3 Sep 3, 2021 · Learn about 6 common symptoms of catalytic converter failure, including the main 3 causes and diagnostic steps to take to fix a bad cat. low fuel/rail pressure. I replaced the 9th injector, cat and upstream egt sensor. You might think it's the other way around, but there is some restriction in the cat and it's main job is to burn un-spent fuel. Just bought an 07 GMC DMAX LBZ 1ton Crew Longbed 135K miles on it. Feb 2, 2010 · Also, it needs to be cleaned out due to soot build-up. With a bully dog triple dog tuner Aug 14, 2016 · Todays cats are great but high flows make it flow even better which the difference between them i dont know but the cat that wasnt clogged is louder so the new cats definately flow better and of course the bad cat (clogged) flows better because stock or not the cat will flow more freely cause it isnt clogged. Jun 20, 2005 · What are some of the warning signs of clogged cats? My car feels like someone shoved a banana in the tailpipes!! Is there some way to test if the cats are clogged?? I can smash it to the floor, it bogs for a minute then it decides to take off. It is kinda hard to get started back, have to hit the starter 3 or 4 times with the throttle against the floor and it starts up like it is May 26, 2010 · Has anyone removed the cat on a stock LLY exhaust and replaced it with a "test" pipe? If so, which brands will fit without modifying the stock exhaust? What results did you get? Any drone in the cab? I'm not running a programmer YET, but am interested in picking up MPG and lowering the Related: LMM vs. Regarding the Cat, can it become clogged up and need to be cleaned/replaced? I've got 113k miles on the truck. Aug 26, 2007 · Hey guys I've got one for you. I’m really hoping I don’t need new injectors rn, and that a fuel pressure plug will help. Sep 25, 2012 · No it does not. Poor fuel flow from the tank. May 16, 2012 · 2007 Black Chevy 2500HD LT4 Duramax LBZ ccsb 18inch kmc addicts 33x12. Racor fuel filter has about 900 miles on it. I think the truck Apr 17, 2012 · 2001 ccsb lb7 airdog2 165 amsoil bypass kitmodified air intake hornppe boost valvenickatine cat filter adapteredge cts insighthigh idle mod5th gear lock out viper remote start airlift air bags 5 inch mbrp straight pipe exhaust efi by creatures of the night (Tony) DMAXSTORE. By the time you add in all the adapters and clamps it was $120 Dec 22, 2023 · If your car is emitting an unusual odor, it may be time to clean the CAT. Explore the causes and treatments for cat congestion to ensure your feline's health and well-being. Let’s dive into the causes Jul 25, 2025 · Feline lower urinary tract disease (FLUTD) is a serious condition! Our experts break down the stages of urinary blockages in cats and treatment Dec 2, 2015 · AD2- MA Sleeves- MA Pump Upgrade- MA Rear Housing Support- LBZ MP- Res. Oct 29, 2016 · Truck: 2005 LLY, Chevy, 2500HD, CCLB Lighting: HID hi/low and fogs replaced by light bars in bumper and all on mod! Tunes: EFI LIVE by Idaho Rob (ATP trucks) CTS2 monitor Air: Modified stock turbo, stage 2 afe intake, 5" exhaust, lbz mouthpiece mod, Fuel: cat fuel filter adapter, air dog 165, LDS 30% over injectors Interior: autometer C2 boost/fuel/egt gauges, fancy stereo/system, DVD on roof Feb 15, 2007 · 06 GMC LBZ Crew Cab Long bed 2500HD Stealth met. Took the Egr off and it was almost completely clogged with soot. Why is that? Well, catalytic converters essentially convert dangerous exhaust emissions into “safer” gases. Asked the customer when he last changed his trans filters and he said he never has Sep 2, 2024 · Discover the lifespan of an LBZ Duramax engine. Mar 4, 2014 · 2006 lbz, rclb, WT package, dsp5 efi from bobo run on max effort, airdog 165, ppe race plug, mbrp tb cool duals, built trans, afe stage 2 cai,ppe sleeves, mbrp boost tube, egr block, mbrp 3''downpipe, pro built trac bars, 6,600lbs of American muscle :gearjamin Apr 23, 2008 · Anyone still have their old downpipe with converter? I wanna try something. Jan 7, 2021 · My personal truck is a 2007 GMC Sierra LBZ CCSB 4x4 with HSP piping, Danville 68stage2r turbo, PPE manifolds and up-pipes, Limitless 1078 TC, Stock trans with Trans Go Jr. LBZ (Comparison of Duramax Diesel Engines) Best Lift Pump for Duramax (Upgrading Fuel Efficiency & Performance) Best Oil for Duramax (Comprehensive Guide) Introduction to Duramax Engines and Oil Pressure Duramax is synonymous with durability and efficiency in the diesel engine world. ! . After Feb 8, 2016 · Description All 6. Problem went away. First Gen II Lightning running on E85! Built motor, Turbo Blown Reply Jan 19, 2021 · I feel like I'm getting mixed signals from reading different posts on what would be best for my particular situation. Dec 5, 2009 · 07' CLASSIC LBZ, 3LT, EFI LIVE W/DSP5 BY IDAHOROB , COGNITO LEVELING KIT, SS SLEEVES, SS WESTIN NERF BARS, ZINC 5100 BILSTIEN'S, SPEED LINER, 285-70-17 COOPER STT, PPE AIR BOX MOD, EGR BLOCK, TRANSGO JR AND DEEP PAN TRANSYND CONVERSION, 4" MAGNAFLOW SS DOWN PIPE BACK , EDGE INSIGHT W/EGT PROBE. Apr 28, 2008 · My LBZ has started dying about 4 or 5 seconds after startup. and Ratio Tech kit. Oct 19, 2012 · Is it a full exhaust (from the downpipe back) or is it a cat back (from the catalytic converter)? A clogged cat will cause this. Nov 5, 2012 · I was on my way home and my check engine light came on and my truck started acting real sluggish i don't know if the fuel filter is clogged up or if it's something else i got home and killed it then started it back up and it acted just fine any ideas? May 4, 2009 · First I installed the new exhaust , thinking it was a clogged Cat and that didn't help with my fuel economy. Jan 26, 2007 · Haulin-Rv 2002 Sterling Acterra, Allison 6 speed, Cat, 42" bunk Gone and MISSED daily!! 2006 Chevy LT Crew Cab Dually, 2wd, LBZ, 6 speed Allison:ro)Member #231 Dually Club:ro) SaveShare Like tuney443 2907 posts · Joined 2005 #5 ·Jan 28, 2007 Rookey;1552042; said: I was curious if this indicator will lower the readout percentage if I ever got some bad fuel and clogged the filter. Got to narrow it down. Ive seen in some cars where you have a no start due to that cat being so clogged. The 9th injector stuck open and roasted the cat. Will I throw any codes by deleting the cat? Will I gain noticeable Nov 14, 2010 · New to the DMAX I always ran a powerstroke before coming over from the dark side. LB7 was a good engine but had some head gasket issues. At first, I thought my ECM needed reset. Oil level was good and there was no blowby so I added a Apr 7, 2022 · Recently i made some emissions repairs on my 2016 lml. Bully Dog monitor for gauges, Husky mud flaps ( front and rear ) 70 gal aux tank, Billet grill, Wheather Tech floor liners. 06 LBZ Sierra. Style Steps Vortex Bed Liner Firestone Ride-Rite Bags with in cab kit ALL Amsoil Fluids & BMK-17Ea Bypass Discover the top signs of failing catalytic converter and learn how to diagnose the problem effectively. May 21, 2021 · 2006 SIERRA CC SB 2500HD 6. Jul 25, 2025 · My question is: Is this normal for LBZ EGR valves? If so what is the normal operation of the port on the bottom? 2 independent shops and the dealer have told me this is not normal, but they keep just wanting to throw new Egr valves at it. Clogged catalytic converters are a common problem that can be remedied with the right know-how and hard work. I hope your not Feb 2, 2010 · What are the symptoms of a failing CVV? I drive short distances regularly, so I fear my car is a prime candidate for CVV failure. SOME trucks will throw EGR codes with the cat off because the flow will be insufficient mine never did and chances are likely that yours won't either. Does any one know the bolt diameter and thread for the bolt that screws down through the Egr into the stock up pipe? Can’t find the old one. I'm still having issues and the truck is still parked. 6L LBZ, MBRP TPB 4", Towing RV "Double", 27 foot 5th wheel camper and a 20 foot Starcraft Fishmaster boat. Buy a new Edge unit or another programmer and dont look back. LMM is an LBZ with different injectors and more emission devices. I searched, and read, and am Apr 2, 2015 · I just installed an LMM/LBZ AIRBOX on my LLY. Once again far fetched but another possibility Nov 12, 2024 · So I have fixed the problem on why my truck didn't want to get up to speed at all. It doesn't smoke (that I can see) or leak anything. You should be fine removing the cat. So now when comparing efficient vane position operation between an LBZ and an LLY you can see that the LLY uses 60% less of the vane position tables when compared to the LBZ. Whenever I am driving it seems to get up Feb 18, 2008 · The finger stick should take care of any related codes. Mar 18, 2012 · The temperatures may be close (withing 50-100*F), but the main thing is the temperature before the cat is less than the output of the cat. nI just bought this truck with 32000 miles on it. Apr 16, 2007 · What function does the catlytic converter have on the LBZ? Its not regulated by an 02 sensor, and if it reduces soot, would blocking the EGR cause more exhaust soot--thereby clogging up? Nov 1, 2009 · cats clogged? need help please! Jump to Latest 4. Oct 15, 2013 · Whenever I have been starting up my truck lately the exhaust has been rattling from the rear of the truck until I begin driving it. The difference is that an LBZ can go as low as 0% to maintain boost. I like the setup, but it is just so quiet. Learn how long a LBZ Duramax can last with maintenance and key factors affecting its longevity. Find out how to unclog a catalytic converter and the related costs. I have a 2006 LBZ, not getting the best mileage, and was told by a friend Low or inconsistent pressure points to a failing pump, clogged filter, or restriction in the supply line (like a pinched hose or clogged tank sock filter). Jan 8, 2013 · 2006 Chevy Silverado . Jun 2, 2021 · How reliable is the LBZ Duramax? 5 common engine problems such as EGR valve failure, water pumps, cracked pistons, and more! Dec 28, 2011 · The same can be said for a LBZ when speaking of high vane position operating characteristics. I have a air dog 100 with new filters every 6 months, and a cat filter adapter on the engine itself. And that was because I had clogged cats so I hollowed them out and the truck drove amazing when I brought it back to the shop it stalled on me when I was about to park but started right back up. As cat owners, we often Nov 1, 2011 · Mine is an 05 LLY completely stock except for whats in my sig. Feb 28, 2011 · 07 lbz silverado classic lbz ccsb banks intake, banks intercooler,5in magnaflow turbo back, EFI by dans diesel performance, bd diesel manifold ,diamond eye downpipe, fass 150, fluid damper, isspro gauges boost, egt, fuel pres. I get ice cold lines post orrfice tube all the way to the suction of the compressor. 6 LBZ 179,000 and ticking 3" MBRP Down Pipe 4" Diamond Cat Back 5" SS tip Edge CTS2 Intake resonator Plug EFI LIVE DSP5 by ATP via BBP AIRDOG2 Interior lighting to BLUE LED conversion 285/75/16 Apr 14, 2014 · 16' GMC 2500HD SLT SOLD - 06' LBZ Duramax - SOLD -4" turbo back straight pipe. Dr. Dec 31, 2019 · 07 classic crew lbz So far stock with cat delete pipe only Sounds like satan getting raped Temporary 33x13x16 on 16x10 rubs like crazy Mar 2, 2005 · 2001- 2004 LB7 federal emission package = no cat 2001 LB7 Ca emissions = no cat 2002- 2004 LB7 CA and NorthEast emissions = cat 2004 up LLY all = cat 2004. In this blog post, we’ll discuss the symptoms of a clogged cat converter, the underlying causes, and how to address the issue effectively. But I thought for $63 a new front pipe would be easier to reverse if I ever had to (or a future owner had to). 2006 White 2500 HD-Allison-LBZ-CCSB-Leather-Sunroof-XM, Bed over spray in Line-X, Truxedo Lo Pro QT, Debadged (except Alli/Duramax), Prodigy brake controller, Raised 1" in front, USA-SPEC iPod to GM interface, EGR Blocked & Finger Stick, Modded airbox, PCV re-routed. May get mild tunes in the future not sure yet. Jan 31, 2025 · I've never had any issues with cats before but after doing a lot of searching it seems like this could be the problem for the loss of power. Mar 2, 2011 · So I'm looking at taking my cat off, what are the pros and cons of doing that? Also, is there a cat delete kit i can buy? Which would be better, taking the cat off or the muffler? Which would give me more hp and mpg gains? and more whistle? I have an 06 LLY. grey EGR Blocker and Fingers Stick;MEAN GREEN 220amp alternator EDGE EVO- MBRP FULL exhaust (CAT GONE!!)-AFE STAGE II Pro Guard 7 Installed Tires: Michelin AT2s 245s & BFG Commercial TA Traction 245s for Winter. com/bl Apr 27, 2011 · As far as the light goes, I believe it depends on the year of the truck. 50 Atturo Trailblades, Alligator ffa with CAT filter, PCV dumped to atmosphere as god intended, 5" turboback, ATS tranny, HIDs, LED's, downpipe, ATS rear diff cover, Bilstein 5100s, Pioneer AVIC Z2, Planet Audio 12" subs, Cerwin Vega amp. Dec 10, 2010 · If it is a clogged cat is there any way to be sure thats exactly what it is? I doubt ill go with servicing it at the dealer but im sure the fix will still be a costly one even at a local mechanic. 95@115 SaveShare Like Status Aug 10, 2010 · 2021 GMC Denali 2500 L5P 2004. Feb 17, 2019 · 07 LBZ CCSB SLT 303, 850 miles : 40Hp EGR Delete/Tow Tune, Cat bk, Edge CTS, WGuard Toolbox, Tool box tonneau on 265/70R/17's. Very cool! How is the flooding up your way? Darcy Washington State 2006 Silverado 2500HD LT3 4X4 CC SB Duramax LBZ Tuff Country 6" lift, 35" Toyo M/T's on 20" Ultra Peacemaker wheels, Quadzilla Stealth2 programmer, Diamond Eye 5" cat-back exhaust, factory Special order color Yellow. Learn why this engine stands out among Chevy models. It has two pipes projecting from it, the input and output, and the catalyst to prepare the gasses for release. mod, MA Aluminum Bleeder, PPE Boost Valve, Banks Ram Air- Intercooler, FASS 150, LBZ FPR, Shimmed FPRV, 4" MBRP turbo back exhaust w/6"tip, Corsa Muffler @180,000-New injectors from Lincoln Diesel, CAT Adapter/filter Mar 26, 2006 · I'd personally look for a clogged cat, I had a very similar problem when I had an IROC-Z. If the engien is running, then the injectors are going to return fuel (they do every time they are fired). Jan 2, 2012 · The cat provides the backpressure so that the EGR can force exhaust gasses back into the intake. blocked- PCV rerouted- EGR Blocked (FE9)- MBRP DP- MBRP 4" (lost kitty )- Autometer Factory Match Boost, Pyro. Fold-A-Cover for the bed. I finished putting the truck together tuesday night, drove it home, drove yesterday and this morning. Ensure your vehicle runs smoothly and avoid costly repairs. Nov 24, 2010 · A clogged cat can create a low boost/no power situation. 6 LBZ Duramax injectors were originally designed by Bosch and they manufacture all the parts. I've never heard of this or seen a DIY for this. Maybe bad spark plugs. Pulled it into the shop drilled a hole before and after the cat, tested pressure and found that the cat was clogged. I don’t like cats but I prefer to be able to breath without coughing. Launched in the early 2000s as a joint venture between General Motors and Isuzu, Duramax It has absolutely nothing to do with your transmission. Jan 19, 2013 · First, I owuld appreciate any response to this post, (my first post on this site). Nov 20, 2016 · I got brand new updated Bosch injectors, hp lines and put a lbz cp3 in it all at the same time, all parts except cp3 were from injectors direct 30k miles ago and I have 3 that are crapping out. Mar 11, 2011 · 07 LBZ 4x4 1LT Banks Speedbrake, EFI Live, 20" American Eagle 507s, 33x12. I left it running Mar 25, 2016 · Reading about he deadly blue smoke at idle, this came up as a possible cause. I could not go over 55 mph and could not even get my turbo to Jun 15, 2013 · Which is better and why? if I put an adapter on my truck with a cat filter am I going to lose my water separation? Or is water always going to settle to the bottom? LBZ (2006 to mid-2007) By the time the LBZ was released in 2006, the aforementioned problems had been worked out. The catalytic converter, typically a large metal box, is located on the vehicle’s underside. 1L It's prolly the CAT. Just my input for what little it is worth. When I was looking underneath my truck and around where the front of the muffler connects to the piping it is covered in black soot. My first question is will removal cause any codes or a need for reprogramming? And Dec 10, 2014 · My signature is up to date. I change mine every 2500 miles for this very reason: I tore out a 6 speed out of a LBZ that started off with trans overheating issues. I had the tuner set on 6 the other night messing around and I threw a code of low fuel rail pressure. I called the dealership I got it from and they took it back on saturday to work on it. If you have fuel in the Jul 16, 2018 · High discharge pressure with normal suction is normally an indicator of of a clogged up condenser or lack of air flow. LLY is overall a good engine had occasional head gasket and injector issues. 2006 Chevy, 2500HD, 4X4, Ext, Short box, 6. Apr 17, 2023 · Urethral obstruction in cats is a life-threatening emergency. Is my muffler clogged, leaking 2006 Duramax LBZ LT trim Full load truck minus sunroof -356000 kms -New glow plugs 2025 -Brand new Cat batteries 2025 -New front control arms,shocks,tie rods, pitman arm -new style Chevy key fob -4 inch exhaust -Egr deleted Couple other things. Cats are known for their independent and sometimes aloof nature, but when a cat is blocked, it can be a serious and potentially life-threatening condition. The engines without a PCV just had a tube to dump the engine fumes to the road. Apr 27, 2011 · i finally ordered a exhaust for my 06 lbz, and when i asked the guy at the garage about putting it on (cause i just don't have time to install it my self) he asked why i was keeping the cat on it. After adding anti-gel additive (if fixed it after 30 Sep 1, 2024 · A clogged cat converter can cause significant issues for your vehicle, from poor performance to increased emissions. The reason I said try and remove that second O2 is because that will let exhaust gases exit before the end of the cat. Since a lot of smoke passes through the Jan 24, 2010 · Don't laugh, I honestly don't know, but . 50 mickey thompson mtz's 100k 4inch,intake SOLD 2006 White GMC 3500 srw W/T Durmax Lbz cclb stock "the problem child" Sold Sep 27, 2010 · The Cat on the LBZ has a tendancy to slow down turbo spool up, so once you get the CAT gone, the turbo works better and thus equals more feel. So for my 05', it can go for 5k or 15kit just depends on how clean or shitty the diesel quality is at your local station. If the hoses feel soft or look crimped, they need to be replaced. After that she ran like a champ! Oct 29, 2012 · The dealer called and said it was a clogged catalitic converter and thats all. I loved and hated my 4. , and Fuel Pressure on the pillar, CS for everything else. What effects the filter minder? Could Mar 18, 2012 · The temperatures may be close (withing 50-100*F), but the main thing is the temperature before the cat is less than the output of the cat. Replacement: If diagnosed as faulty, replace the lift pump promptly. my truck would barely move though, no codes or anything. hu -EFI Live -Amp steps -6" Pro Comp lift -AFE filter -US Speedo gauge kit -Rhino lined bed -Mag-Hytec Dif. Truck is at 88k miles. 3 at the same time. It LBZ has EGR and CAT. Kinda like a LB7 does with bad injectors. LBZ. Usually, this it s a clogged cat, which will break all kinds of other things - I'd start here and see if it fixes your other issues. And do you have any thoughts on them? Would it be worth while to convert? Jun 21, 2025 · I have a 2004 jeep wrangler i just dida tune up and rear pipe and muffler however now my cats I have 3 must be getting clogged sometimes barely run was hoping to cut Mar 7, 2023 · How Does A Catalytic Converter Work? Before delving into why a catalytic converter glows red, it is essential to understand how it operates when it’s not faulty and why it does so. Question; What does the EGR mod do for the truck in terms of MPG's, engine life, horsepower and how does it effect the Allison 1000 tranny? I am not real concerned about the horsepower as much as I am the engine life and MPG's. the spin on filter has been Jun 18, 2006 · I am looking at getting a new frontpipe and wondering if there are any reasons not to remove the cat on my LBZ. LBZ is considered the “best” and is when the 6 speed was introduced. IMO, cats are clogged when they are new. I am going to replace the CVV and hoses once it warms up a bit this spring. The engine seems to be running fine (temp okay, no smoke), but I have only driven it 5 miles since the engine Mar 22, 2016 · Does anyone have the part number for the cat filter adapter for a LBZ duramax. i thought i was doing good by getting a banks monster system, i have herd of taking the cat off but A P0299 diagnostic code indicates an underboost condition. Cover -35" Mickey Thompson ATZ's wrapped arounD 18" Moto Metal wheels -Navi deck, Kicker speakers, and 2 10" Kicker subs Save Reply Quote Like Sort by Oldest first bigjohn 5,819 posts · Joined 2012 #2 ·Apr 14 Jul 6, 2013 · SOLD 2001 GMC Sierra 2500HD, CC,SB EFI Live V2 w/dsp5 MAX EFFORT by Idaho Rob, EGT's Never higher than 1150* :thumb Cognito Braces, and ATP Sleeves, BD Manifold, ARP H. I'm new here, but this isn't the first forum I've joined, so I appreciate everyone's input and hope you can spare me the "use the search" lecture. Dec 30, 2021 · Only thing I can think of is egr, or clogged cat, unbolt front cat pipe from down pipe and drive it Oct 23, 2011 · NEW TRUCK- 2006 LBZ cc/sb loaded southern coach, smoky mountain sportsman edition, 20" black hostile havoc's, 305/50/20 nitto trail grapplers, EFI LIVE by rob at ATP performance, 5" exhaust, transgo jr, egr blocked, pcv rerouted, isspro ev2 gauges, tinted windows, just gettin started! Oct 23, 2009 · I have a 2007 LBZ with 140K, and it has been knocking on and off at idle and under light load. Aug 23, 2011 · Hi All, I picked up a 2007 gmc 3500 last friday, I drove it 20 miles on the highway and it started to beep and tell me the transmission is overheating and to let the truck idle. I already have the Banks monster exhaust and want more sound. Do it asap. P. We do have a detailed blog post on the EGR valve here: https://bulletproofdiesel. Therefore, when you purchase OEM Bosch Reman Injectors, you can be assured that you are going to get quality above and beyond any other manufacturer. It came off and a cheap ass summit racing one went on. I have seen an intake with 50,000 easy miles on an LBZ and it was almost completely blocked off on one side with crud from the EGR. Experiencing low fuel rail pressure problems when it's cold out side. So like any responsible diesel owner I am replacing the Egr with a new one. Until then, I want to know what the warning signs are. I hauled my 42' fifth wheel from Irvine Ca out to Larkspur Co and had a series of issues along the way. How much is to much-- hard to tell! I would not worry about it. Aug 20, 2020 · New to owning a diesel. if there is large amounts of pressure in front to the cat; then its a clogged cat (assuming, checking the rear is low pressure) and/or get a temperature probe or laser thermometer (the least accurate of the two tests). If the outlet side is cooler, the cat is clogging up. If I have to, I'll take the car to an indy. Today it throws the good ol def Jan 27, 2025 · If you own a GM Duramax (especially L5P or LBZ models), seeing the P0087 code (“Fuel Rail/System Pressure Too Low”) can feel like a gut punch. Jan 19, 2013 · I have a 2006 LBZ, not getting the best mileage, and was told by a friend that I should eliminate the cat. Jul 24, 2007 · How do I know when my cat goes bad, as it wouldn't send code with finger stick? I know the obvious sign might be loss of power, & mpg, but not necessarily as those factors could relate to bad fuel. You can unclog your car’s catalytic converter by using a specialized catalytic converter cleaner designed to remove grease and oil build-up inside Jul 12, 2013 · I just returned from a camping trip in Colorado. Ordered two separate kits and the bolts start to thread Dec 16, 2018 · Cats on diesels are different than what gassers have, and many people are still running catback for years on diesels with thousands of miles on with no troubles. 2005 Silverado 2500HD ECSB 11. Check the fuel hoses where they come from the frame under the drivers door to the transmission bell housing. 5 3500 Silver Birch LT 4WD Bullydog PMT, V-2 W/Fan BD Maifold, EGR Blocked, Silverline (No Cat) LBZ Mouthpiece, PCV Reroute Save Reply Like Randy_the_Hack Jan 27, 2014 · If so how do you do this on an LMM? where is the ficm? Yes, you can only do a return rate test with the injectors not being triggerred. My brothers cat came apart somehow and the honeycomb structure inside turned sideways and all but blocked his exhaust in his gas truck. It could also be from non condensables in the system such as air Yep. Same thing happened. This issue is notorious in Duramax engines, often linked to failing CP4 pumps, clogged filters, or sensor errors. The filter was put on in December but every time I drive and pull some hard runs on my race tune, my filter minder keeps turning or showing all red or progressively redder to show its stopped up or not flowing. Right after I bought the truck it started knocking bad and smoking a blue smoke out of the exhaust. I started my truck this morning to go to work an she started an idled fine I pull out of my driveway an about 300ft after pulling out it wouldn’t accelerate an wouldn’t go up over 1000rpm an as soon as I pulled off the road an it got down to idle rpm it Apr 7, 2016 · My 2007 GMC LBZ is showing a fault code of P0299 on my Torque App. I'm not sure if the filter is just getting clogged with 12000 miles or is there a pump Apr 3, 2014 · 2006 2500HD LBZ 4X4 CC/SB LT3, 265/75R16, Rhino Liner, PCV Reroute, Resonator Plugged, 35w 6K HID Low Beam & Fog Lights, LED Interior Lights, ISSPro Pyro, Boost, & Rail Pressure Gauges in A-Pillar, Cognito Idler/Pitman supports, more to come soon. You are reading this because you are looking for information on how to unclog a catalytic converter. Would this cause any ill effect if I do this? Thank you in advance. It should NOT be a steady stream or big puffs. At first I thought it was my fuel gelling when it was 0 degrees outside. How do I test to see if the pcv valve is bad or lines plugged? Aug 2, 2021 · Most LB7 engines did not come with a PVC system- (Ca engines did have PCV)-cat and egr- so if you remove the filler cap while idling, it may have some smoke. By recognizing the symptoms early and taking appropriate action, you can avoid more extensive damage and costly repairs. Stock other than that. It is probably true; once you drive a car with an internal combustion engine, you should expect to experience a clogged catalytic converter. Aug 30, 2023 · I have been getting egr codes for a while off and on. I asked are you sure something upstream is not causing the clog? and they said they would diagnose it further tomorrow after they install the new cat and clear all codes. Not sure, but I believe you pull the ignition 1 relay on an LBZ/LMM during the test. Jun 15, 2019 · Was wondering if anyone could give me more insight on how to fix this problem. Mar 29, 2025 · Are you experiencing decreased fuel efficiency or increased engine noise due to a clogged catalytic converter? If so, you’re not alone. In addition the test results using Torque indicate the EGR Monitor Bank 1 may also have problems (current 183. p0300 could be fuel contamination or clogged injectors. mbrp 5" turbo exhaust (no muffler or cats) modified stock air intake, EFI by Kory Willis, Big Dipper stage IV trans, Precision ML, Pump rub fix, Alligator trans lines, Autometer guages, Airdog II-165, Ready Lift leveling kit, 285/75 Nitto Dune Grappler, Bilstein shocks, Cognito idler and pitman arm braces, PPE tie Aug 25, 2009 · Fuel Pump Going Out? Clogged Cats?? 2553 Views 15 Replies 7 Participants Last post by Manic Mechanic, Sep 1, 2009 Jump to Latest Ender06 Discussion starter ·Aug 26, 2009 2002 2500HD 8. I'll let the TrannyMan handle the rest: P1811 P0742 Dec 2, 2011 · Banks intake and cat back,Diamond Eye downpipe and frount pipe,EGR Blocker Plate,PPE bleeder screw,HIDs,Big O ace throttle spring,linex bed liner,big blue nuts, Afe Mouthpiece with the res and pvc ports welded shut Auto Meter Phantom 2 boost, pyro and frp, EFI tuned buy duramaxtuner, pro stock pvc and Frount and rear Weather Tech floor liners Mar 1, 2011 · This is kind of far fetched, but do you still have the cat on? It could be that its clogged or busted up and is causing a lot of exhaust backpressure. If you don't block the EGR, what get's plugged up? I've never done this and at 78,000 miles the truck is running great. Apr 6, 2021 · This guide is designed to diagnose the exhaust from your diesel's tailpipe and help you understand exactly what each diesel smoke color means. HAD to get another LBZ. EFI Live AutoCal V3 DPF Delete Tuner | DPF Delete, CAT Delete, DEF Delete & EGR Delete | Increase fuel mileage | Improve reliability. Mine went into a "Limp" mode when my filter went bad. LMM has EGR CAT and DPF, LML has EGR CAT DPF and DEF. Mine is a 05' and does not tell me when or what percentage my fuel filter is at. Aug 1, 2011 · Originally, I wanted to just cut the cat out and weld in a little section of 3. Reduce backpressure, enhance fuel flow, and boost overall engine performance. It only does it on its first startup in the mornings, or after sitting for several hours. it is a 3 micron fuel filter and water separator. Sep 1, 2024 · However, when the cat converter becomes clogged, it can lead to a range of problems that affect your car’s efficiency and drivability. pcv reroute, cognito uca with bilstein 5100, batmowheel in stock charger, high flow fuel rail fitting, egr blocker Jan 8, 2010 · 2004 CC/SB LLY 4x4 LBZ mouthpiece, 4" Downpipe back MBRP, Quadzilla S2, RIP Cat, EGR blocked, Autometer Phantom II gauges Needed: PCV re-route, maybe EFI someday so much more so little $ Oct 5, 2010 · Guys, if you havent replace your red spin on filter in awhile, do it now. Not much! I am on a tight budget (who's not) and want to do some mods as i can mainly to improve MPG. Learn possible causes, symptoms, and troubleshooting tips for P0299. In this video, we explain the symptoms of a bad EGR cooler and valve. This was also the first revision of Duramax, as the new LBZ had beefier internals and an upgraded fuel system. Jul 22, 2022 · How do you delete the Duramax LMM DPF System? Learn how to delete the DPF and DOC as well as the pro's, con's, and performance benefits. JoAnna Pendergrass, DVM explains its causes, symptoms, and treatment. This did NOT affect my power or EGT’s, Jun 15, 2010 · Check fuel pressure first. Nov 14, 2019 · Hey y’all I’m hoping someone can give me a little insight on what’s going on. 5 MPG driving at 75 MPH hand calculated over 350 miles. That may be clogged. Mar 13, 2024 · Overview of Duramax Injectors Duramax injectors are essential components in diesel engines, with various types tailored for specific models like the LBZ. It’s the DPF that has problems getting clogged up, not the cats so much. If thats all good let us know as we could be here all day suggesting things. Dripping with oil and dye. COM, Your Duramax Diesel-Only Shopping Resource Save Share Reply Quote Like colton3 Discussion starter 491 posts · Joined Mar 14, 2023 · As a last resort and assuming my cat is clogged, would it be better to hallow out the cat than to keep driving on a clogged cat until I can diagnose the problem that caused this and replace it. I’m looking into getting a lift pump to run the cat filter and prolong the cp3. Low fuel rail pressure cripples performance, causing rough idling, hard starts, or even engine shutdowns. What size LP is anyone running in this application? (stock). The drop in power just got worse and worse until I changed out the cat. I wouldn't think it would get clogged at 10,000 miles though. you can run a donaldson p553203 on your cat adapter. Thats def not good for the engine. Feb 21, 2024 · In this article, we’ll cover how to diagnose a clogged catalytic converter and provide tips for fixing the issue. . I've got a 07 LBZ with 4" turbo back exhast, banks ram air and 6 gun. Apr 2, 2025 · Nasal congestion in cats can be more than just an inconvenience—it can significantly impact your feline friend's quality of life. A blocked tear duct in a cat can lead to discomfort, eye infections, and even vision problems if left untreated. Apr 13, 2014 · you can do either/or drill a small hole in the front of the cat and the rear of the cat and use (find one first) a pressure gauge. Then I installed the new Edge Racing unit and my MPG jumped back up to 18. 1K views 7 replies 4 participants last post by 05greendmax Nov 1, 2009 W Sep 12, 2013 · A few days ago I pulled the low pressure in fuel rail code so I scanned around and found several threads listing the ppe shim kit as a fix so I went ahead and bought it and installed it last night. Power is nice but secondary. If you let it clog up, does that then block the EGR? Jan 18, 2015 · 07 LBZ Dually, Aero Turbine muffler, Nicktane with 2 micron Cat filter, some John Kennedy parts, 235-85-R-16 GoodYear Duratrac's on Eagle 058 rims. Here's a detailed look at Duramax injector types and their applications in vehicles such as the GMC 3500: Types of Duramax Injectors: LBZ Injectors: Specifically desi Oct 9, 2024 · Learn the signs of a bad O2 sensor or catalytic converter, how to diagnose the issue, and understand the impact on your vehicle’s performance and emissions. In this article, we will discuss the treatment options available for cat blocked tear ducts, as well as explore some interesting trends . as for Truck thieves. Also, examine the causes of a clogged catalytic converter, how to prevent it, and more. Studs, M.