Question about 2002 Chevrolet Silverado 3500
I am starting to loose power and notice when i step on the accelerator there is a delay i power.
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Posted on Jan 02, 2017
Black smoke means "fuel not being combusted" or "runnig rich". I have no doubt you have gasoline. Your spark may not be burning the gas. Is there a check eng lite? If EGR was sticking, you would probably get a check engine light for this. If your truck has a Vortec design, I would find out if you need a new "spider". What is your mileage? Are you due for a tune up? What spark plugs are you using? Vortec? "Not all the time" sounds like intermittent. When was the last time you changed the fuel filter? Can't hurt to change this. This would be the actaul starting point for me. I would change the fuel filter which is under the driver under the chasis. You will need a 16MM and a 20MM. USE ONLY LINE WRENCHES. You may need a fuel line disconnect kit too depending on your model. Notice it only happens on acceleration? that is when you are forcing even more fuel thru the system, but not enough of a fuel stream make cause sputtering and when the fuel comes thru too rich that would be the black smoke. It sounds like you have the 2 extremes. is there afuel regulator on your vehicle? If so, you may need to change that too. Good luck.
Posted on Sep 10, 2009
SOURCE: 2001 S10 4.3 vortec 4x4.
it could need a fuel injector cleaning or replacement if an injector has a problem.check the air filter as i`v seen them so plugged to cause this type of problem.there could also be a problem with the throttle position sensor(tps)not sensing the proper voltage increase when moving the throttle.i guess you installed a new fuel pump not a used pump but sometimes even a new pump is defective and the fuel pressure and volume should be checked.it`s also possible the catalytic converter is plugging up and needs to have the exhaust back pressure checked.at idle the pressure should be less than 1lb pressure and at 2,000 rpm`s should be less then 2.how dirty was the filter when it was replaced it could need changing again if there is alot of dirt in the fuel system.
Posted on Apr 01, 2011
Testimonial: " Truck shut down approx 100 yrds from local garage. They confirmed the fuel pump was the problem. Thanks for your response! jh"
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