• Cold Start-Up Misfires – 2003 Chevrolet Tahoe 5.3. This case study will involve a couple different and effective ways that I use to diagnose fuel trim issues.I’m going to use a 2003 Chevrolet Tahoe with a 5.3 liter with just over 60,000 miles on it I did for a used car lot.
  • P0171 And Rough Idle Chevy Vortec Multiple Misfire Code P0300 - Cheap Fix (Crankshaft Sensor Relearn) Here's a way to possibly solve a random misfire code on a Chevy Vortec 6.0. Mine is a 2000 2500 with 74,000 miles. Chevy Vortec Multiple Misfire Code P0300 - Cheap Fix (Crankshaft Sensor Relearn) 2007 Silverado 2500HD Classic, 182,000 miles, 6 ...
  • I have a 2011 Chevy 2500hd with 6.0. The truck has developed a misfire at idle and partially on the gas. I have replaced all the spark plugs, all 8 injectors, moved coil packs around, replaced MAF, MAP, b1s1 02 sensor (was getting codes for that sensor only), ECU, fresh gas and added cleaners, cleaned throttle body and swapped throttle body, had cats removed (already were blown out and empty ...
  • 2000 Chevrolet Silverado TSBs (Technical Service Bulletins) from the NHTSA. ... Description: 1999 - 2005 GEN II COLD ENGINE MISFIRE AT IDLE WITH POSSIBLE P0171 AND/OR ...
  • Chevrolet code P0300 indicates that one or more cylinders are experiencing misfires. A misfire occurs when an insufficient amount of fuel is burning in a cylinder. The efficient burning of fuel is essential to engine operation as the combustion of fuel is what provides the energy to power the engine in your Chevrolet.
The most logical starting point, when troubleshooting a misfire on your 4.8L, 5.3L or 6.0L pickup, van or SUV is testing the COP coils for spark. Why? Because a failed COP coil is usually the reason behind the misfire in the majority of cases. Here are my specific recommendations: Check for misfire codes with a scan tool first.My 6.0 has been randomly having surging issues during idle. Doesn't happen all the time but mostly when it does the engine is warm. If I turn the A/C off it gets worse when it is surging. During surging the the ICP will fluctuate down in the the 540's Occasionally I have to crank it twice before it will fire. Hi, I have 2009 Chevy Silveraor with about 88,000 kms. Purchased the truck in December and have been having rough idle conditions and what feels to be misfiring(on morning start up, sitting at lights I can feel it, and during the daytime if it has sat for a couple hours). Jul 21, 2018 · 2015 6.0 L96 Misfire Mystery Jul 21 2018, 3:51am Guys, I've searched forums and googled my a$$ off for the last two weeks and haven't found much of anything related to misfires on the newer models.
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MTblazer87 said: Working on a 06 chevy with a 6.0, it misses on cylinder 2 and 7 at an idle 6-700rpm but not at 1000rpm. New spark plugs, wires are good even switched them and didn't change anything, checked coil packs and switched them around no change, then even put in new injectors still the same.DEFINITION: Engine runs unevenly at idle. If severe, the engine or vehicle may shake. Engine idle speed may vary in RPM. Either condition may be severe enough to stall the engine. 1 : Was the Powertrain On-Board Diagnostic (OBD) System Check performed? — Go to Step 2 Nov 14, 2009 · Idle problem, misfire and backfire Results 1 to 19 of 19 This is a discussion on Idle problem, misfire and backfire within the General Help forums, part of the LSx Technical Help Section category; My car has a slight miss at idle. Hopefully it will just read misfire cylinder 2. and flashing CEL does mean misfire right now. keep your fingers crossed for me. ... 2001 Chevrolet 2500HD 6.0 8" 5.13s 38s 1978 K30 Dually ... spray a carb cleaner or stuff like that at the intake gaskets. see if it changes idle. 05 gmc cc with full custom frame //NC FL\\ 06 silverado xcab 2500hd ...i have a 2008 Silverado Crew Cab w/ 5.3 ltr V8. I took it in to the shop for rough idle. They claim no codes came up therefore no issue. Anyone experiencing this issue? Any input of what it may be? Vehicle has 28,000+ on it. Getting ready for a trip so i'd like to remedy this issue asap... My big orange 2006 Silverado 2500HD (known now as Donald Truck) is suffering from a P0300 code, which means rando misfire. I've done plugs and wires, which well well overdue, cleaned the maf and put a can of sea foam in the tank. Looking for some G8 GT input from my S10 people, I haven't had any luck elsewhere. The car is an '09 with an L76 6.0L that recently had the stock cam and DOD lifters replaced along with new gaskets throughout and new O2 sensors (all done by the P.O.). I've replaced the crank position sensor (it...
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Chevy 6.0 Engine Problems. The 6.0L Vortec "6000" engine was introduced in 1999 and remained in production until 2019 when it was replaced by the 6.2L Vortec. The Chevy 6.0 is a small-block V8 engine that produces 300hp-345hp and 360tq-380tq, depending on the engine version. The 6.0 engine had nine variations over its 20 year life span.
2003 Silverado rough idle, idles good after "check engine" light My 2003 silverado idles very rough, and then the - Chevrolet 2003 Silverado Ss question
200k Vortec 6.0 running rough with misfire - how much to fix? Looking at buying a 2500HD with a 6.0 Vortec running rough/misfiring with a CEL, about 200k miles. It's sat for a few years so could just be bad gas but unlikely.
My 6.0 has been randomly having surging issues during idle. Doesn't happen all the time but mostly when it does the engine is warm. If I turn the A/C off it gets worse when it is surging. During surging the the ICP will fluctuate down in the the 540's Occasionally I have to crank it twice before it will fire.
Mar 11, 2020 · Change idle to 790 RPM, studders and misfires occur at the same rate as 550 RPM. Change all idle settings to 800 RPM, drive like this for a week, aside from pulling hard on the brakes at a stop, truck runs so smooth. Replaced injector in #2, matched the new injector p/n to the one previously installed, installed new seals on the other 3.
Apr 20, 2020 · While there are a variety of reasons your Chevrolet Silverado 1500 has a rough idle, the most common 3 are a vacuum leak, an issue with the spark plugs, or a problem with the ignition coil.
Looking for some G8 GT input from my S10 people, I haven't had any luck elsewhere. The car is an '09 with an L76 6.0L that recently had the stock cam and DOD lifters replaced along with new gaskets throughout and new O2 sensors (all done by the P.O.). I've replaced the crank position sensor (it...
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P0300 random misfire at idle. Chevy 6.0 random misfire at idle. Random misfire at idle. Compare Search ( Please select at least 2 keywords ) Most Searched Keywords.
Mar 11, 2020 · Change idle to 790 RPM, studders and misfires occur at the same rate as 550 RPM. Change all idle settings to 800 RPM, drive like this for a week, aside from pulling hard on the brakes at a stop, truck runs so smooth. Replaced injector in #2, matched the new injector p/n to the one previously installed, installed new seals on the other 3.
Nov 11, 2011 · By Ralph Kalal “Fuel trim” is the amount of fuel added or subtracted by the PCM. The PCM starts out with a baseline fuel/air mixture that it believes will achieve a stoichiometric ratio.
Nov 16, 2015 · I recently received this vehicle from my brother-in-law, I have done the maintenance on this vehicle for years and have never been able to figure out the random misfire. Now that I have the vehicle I want to fix it. The vehicle is a 2003 Chevy Silverado 2500hd, 6.0 V8, 4×4, 193,000 miles.
Nov 12, 2018 · 6.0L Ford Power Stroke Engine Misfire Diagnostic P0300 Working on a 2005 Ford F-350 Super Duty with a 6.0-liter diesel engine and we have a cylinder 7 misfire. The first thing we did is did a cylinder balance test to make sure that it was, in fact, the seven-cylinder that was in fact misfiring and it was.
    Soon afterwards the check engine light came on, read it as “cylinder 3 misfire”, car developed a rough idle that felt as though the car would stall but the car ran smooth above 10-15MPH. Took it to a mechanic, they changed all spark plugs and coils saying that was the cause. Problem not solved.
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    Even while idling I could still hear the ticking, and sounded like the car would backfire while attempting to accelerate. I believe it gave me a go of P0300 of Random Misfire, and low oil pressure. I understand this could be numerous things causing a misfire. I have changed the spark plugs and still have the misfire.
    Sup fellas, I've recently gotten a cylinder 3 misfire on my 96 SS. Background Info: GM 845 cam 1.6 Crane Golds K-motion springs 3400 Stall CPT Trans Pro-Race/Street 3.73s Eaton Posi Afterburners 52mm TB Dual Cone CAI 2.5 Catbackw/ Spintech Prostreets (No Cats) Those are pretty much the...
    Aug 29, 2018 · hi i have Chevrolet caprice 2009 v8 6.0 ltr im having same problem but with cylinder 7 , (p0307) , often it accrues in idle or low speed , i replaces all spark plugs , i cleaned fuel injectors and swapped its position , i checked the cables and swapped the coils , but problem still exist .
    Posted to GM Driveability on 11/9/2011 16 Replies. Thanks for any help or ideas! This is a plow truck that came in for preplow season maintance with no check engine light (new owner just purchased the truck) and the truck returned with a random misfire (code p0300) on many cylinders (using tech 2) but mostly c...
    Dec 13, 2013 · when you first start it it stumbles bad then kinda has a rough idle but when you accelerate to about 2 grand on rpm's it runs normal can barely feel misfire then when you let go of throttle it acts like It wants to die but just runs rough. it doesn't start smoking till you run it for about 5 or more minutes then it starts to fill garage up with white smoke but if you give it gas it turn almost ...
    IDLE TIME: Run engine (do not drive) for 2 1/2 minutes with the air conditioner on and rear defroster on. During this period the ECU will be running the Oxygen Sensor Heater self-test, Air Injection System Passive Air test, EVAP Purge "No Flow" test, Misfire Detection.
    Dec 07, 2018 · Chevy Trailblazer P0306 Definition. P0306 is a cylinder specific misfire code, which means that Cylinder 6 is misfiring and causing it. An important thing to understand when finding the location of Cylinder 6 is that it’s going to be the sixth cylinder in the firing order. It won’t be the sixth cylinder that you might see when looking at ...
    2007 chevy vin u 6.0 has misfire on #7 & 2 at idle only above 1000 rpm goes away. Have traded plugs/ciol/injectors also had valves done on motor 105,ooo on motor. Have lab scope injector coil ckeck ok I do known in the fire order 7&2 are next too each other Any help would be nice thank you dale I have over 40 yrs in this feild of diagnostic
    Jan 29, 2013 · 6.0 - 170k Fairly Recent Fuel Pump, Spark Plugs, Oil Change, Cleaned TB and MAF sensor I just pulled exhaust manifolds and replaced the gaskets. I now have a bad misfire. Only at an idle/low rpms. No CEL, but i did get a p0300 from the computer. I can't figure this out for the life of me. I have about 50psi fuel pressure while running, 58 ...
    1A Auto: Aftermarket Auto Parts Online Retailer. 1A Auto believes in empowering you, our customer, to do your own car repairs. We offer a large selection of high quality car parts online, expert customer service , and helpful how-to automotive resources.
    Mar 14, 2018 · Oil change fuel pump and filter in tank change spark plug change wires and coils. Air filter mass air flow changed. I now have one code only that keeps popping up with rough idle random misfire code p0300 thats the only code. Oh replaced and relearned the ckp sensor. This thing has stomped my hined end!
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    Step 3 – Engine noise: coughing and cylinder misfire. Rough idle or interrupted acceleration are signs of cylinder misfire, often accompanied by the Malfunction Indicator Lamp (MIL). The MIL may illuminate steady to indicate that a fault has been recorded and your Silverado appears to be unaffected.
    03 chevy express 6.0 misfire code po300, rough idle, sputters and stalls. - Chevrolet 2005 Express question
    Jan 27, 2018 · Regarding a ticking noise or misfire on 2005-2014 GM V8 engines. Therefore with AFM (Active Fuel Management, formerly known as displacement on demand (DoD)). Engine ticking or misfires seem to be happening on cylinders 1, 4, 6 and or 7 on the effected engines. Causing this ticking or misfire condition may be the result of an AFM lifter.
    Jan 09, 2005 · Idle. The engine must be run for two and a half minutes with the air conditioner on and rear defroster on. The more electrical load you can apply the better. This will test the O2 heater, Passive Air, Purge "No Flow", Misfire, and - if closed loop is achieved- Fuel Trim.
    2003 Silverado rough idle, idles good after "check engine" light My 2003 silverado idles very rough, and then the - Chevrolet 2003 Silverado Ss question ... 07 chevy classic 6.0 2500hd. Anonymous Mar 29, 2014 ... have had 6 S ilverados in the last month with a bad injector that caused all of the cylinders on one side of the engine to misfire ...
    May 07, 2018 · I have a 2007 F-250 4x4 with 6.0. It has 132,000 miles on it. It is currently in the Ford dealership and on week 4. It started out it ran ruff at an idle. I changed oil and all filters. did not help. At the Ford house, I was told it had 6 bad injectors, they changed all 8. Then they changed the ICP sensor, and changed it again with a new pig tail.
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    The following TSBs of Chevrolet are related to DTC P1682. 2002 Chevrolet Trailblazer Electrical System TSB Details …; 2002 Chevrolet Trailblazer Engine and Engine Cooling TSB Details …
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    Jan 27, 2018 · Regarding a ticking noise or misfire on 2005-2014 GM V8 engines. Therefore with AFM (Active Fuel Management, formerly known as displacement on demand (DoD)). Engine ticking or misfires seem to be happening on cylinders 1, 4, 6 and or 7 on the effected engines. Causing this ticking or misfire condition may be the result of an AFM lifter. Chevy Duramax (6.6) and older (6.5), and (6.2) liter engines. We also service and repair medium duty trucks, powered by, International, Cummins, Caterpillar, Isuzu. We have the special knowledge, skills, and equipment needed for proper diagnosis, and repair of today's modern diesels.
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    Mar 14, 2018 · Oil change fuel pump and filter in tank change spark plug change wires and coils. Air filter mass air flow changed. I now have one code only that keeps popping up with rough idle random misfire code p0300 thats the only code. Oh replaced and relearned the ckp sensor. This thing has stomped my hined end! MORE: 2014 Pickup Truck Gas Mileage: Ford Vs Chevy Vs Ram, Who's Best? The recall affects 370,000 of the full-size trucks equipped with the 4.3-liter V-6 and 5.3-liter V-8 engines.
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    Aug 29, 2018 · hi i have Chevrolet caprice 2009 v8 6.0 ltr im having same problem but with cylinder 7 , (p0307) , often it accrues in idle or low speed , i replaces all spark plugs , i cleaned fuel injectors and swapped its position , i checked the cables and swapped the coils , but problem still exist . »
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    I've had my 99 GMC 4.8 LS for a long time. I've run into 2 simular issues over driving from 140K to 286K. I had a coil going out that acted simular, but bad enough on the scanner to trigger a specific cylinder miss-fire. 2nd simular occurence, as mentioned by another board member JStand, was a crack in the intake tube close to the MAF sensor - it was hard to see.
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    2000 Chevrolet Silverado TSBs (Technical Service Bulletins) from the NHTSA. ... Description: 1999 - 2005 GEN II COLD ENGINE MISFIRE AT IDLE WITH POSSIBLE P0171 AND/OR ...
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    Chevy 6.0 misfire at idle

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