Last post on Dec 05, 2013 at 8:40 PM
You are in the Chevrolet Silverado & GMC Sierra
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Chevrolet Silverado 1500, GMC Sierra 1500, Chevrolet Silverado 2500, GMC Sierra 2500, Chevrolet Silverado 3500, GMC Sierra 3500, Truck
#360 of 403 silverado 4.3 missfiring on number 5
Oct 19, 2010 (12:24 pm)
hi i have a 2000 silverado 4.3 just replaced intake manifold gaskets,and now its not firing on number 5,got new plugs and leads swaped number 3 injector to number 5 pulled plug lead off 3 and engine noise changed pulled lead off 5 no change,had compression test on 3 and 5 both same reading ,got good spark ,never replaced intake gaskets went ok but the last bolt snaped so had to take it off again and replace bolt now have this missfiring any help would be nice its hard to find as im in uk thank you
#361 of 403 Re: P0405 ECR Sensor A Circuit Low [dmbaero]
Nov 01, 2010 (4:27 am)
Have 99 GMC Sierra with same problem last two winters. Changed fuel pump, filter, regulator, and MAF. Still get service engine light when cold, driven short distance, stopped and then restarted in short amount of time (less than one hour). Was thinking of changing EGR but you said that did not work. did you find fix yet?
#362 of 403 #361 of 361 Re: P0405 ECR Sensor A Circuit Low [dmbaero] by dwh4 Nov 01, 20
Nov 01, 2010 (6:07 am)
I know these trucks have a problem with their "Heat Temp Sensor", it tells the computer to keep dumping fuel because the computer thinks the motor is still cold, it keep's flooding the engine! Just something to check !
#363 of 403 Re: Popping Noise [mudding]
Nov 01, 2010 (6:14 am)
Check your "Heat Raiser", sometimes these things will rust closed and cause this noise! The Heat Raiser is located on the exhaust manifold ! Just turn it by hand with engine cold, so you wil not get burned! If it turns or works , then not the problem and you will have to look else where !
#364 of 403 2003 gmc sierra
Dec 07, 2010 (4:14 pm)
truck lifters tap when first cranks up in mornin when engine warms it smoothes out until park after about a hour it does the same until engine warms then smoothes out again
#365 of 403 Re: 04 gms sierra "reduced engine power" [speedorepair1]
Dec 27, 2010 (5:59 pm)
does this problem have any todo with the catalic comverter or sensors its hard to see the atcual problem because when that happens i just turn off the truck and restart it and the error message dissappears,so i can't even put the diagnastics machine because when that happens i have to restart,do anyone have the same problem?if so what did you do about it what is the problem
#366 of 403 Re: 2004 GMC Sierra 5.3 Low Idle [dentek]
Dec 27, 2010 (6:05 pm)
not yet when that happens iam forced to turn off the truck and restartit so i can;t even take it to a mechanic where he can hookmit up to a dia,machine so,iam left with no answers to where to begin looking for my problem
#367 of 403 Re: 2004 GMC Sierra 5.3 Low Idle [dentek]
Dec 27, 2010 (6:08 pm)
my truck don;t low idle it runs great then all of sudden it slows down and the light appears that says reduce engine power then i have to turn truck off then turn it on again then the light dissappears
#368 of 403 Re: 04 Silverado "reduced engine power" [speedorepair1]
Dec 27, 2010 (6:15 pm)
did it fix your problem or does your truck message reduce engine power still come on does it doit every now and then or all the time ,what do youdo when this message comes on?
#369 of 403 Re: Lifters, valves [kevin1970]
Feb 19, 2011 (10:12 pm)
I had good luck with taking out 1/2qt of oil and replace it with transmission
fluid.I would run it for 4 or 5 days then change oil.That will clean the top real good. good luck deweyii