Question about Cars & Trucks
More info is needed for even a basic diagnoses; over 40K miles, on a fuel injected/throttle body, it could be a fuel filter or clogged jets. More specific information/specific details will lead to more definitive answers.
Posted on Jan 03, 2013
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Posted on Jan 02, 2017
listen for a vaccum leak.also try disconecting bat for 5 min the reconnect and start truck and hold idle at 1500-2000 for 5 min. this resets and teaches computer to self adjust
Posted on Nov 16, 2008
Please be fast about checking your fuel pump. It is not giving enough fuel pressure.
Posted on May 25, 2009
I had a 96 GMC 1500 with a 5.7 ltr. It would idle rough, especially on start up. After replacing everything under the sun, it turned out the ECM (computer) was shot. I found a used one and plugged it in and it ran fine. I think I paid 50 bucks or so for it. If you know someone with a truck like yours, plug theirs in and see if it fixes it.
Posted on Apr 19, 2010
Does it have the 2.3l Quad 4 engine? If so replace the plastic piece that the coils go into, they go bad and leak spark to the cam towers and then you get a nice one or multiple cylinder misfire.
Posted on Apr 30, 2010
My recomendations would be to check your plugs and wires for damage.Check the fuel pressure to the fuel rails for proper pressure.This should be done by your local shop.If the pressure is low it could possibly a fuel pressure regulator,clogged filter,fuel pump going bad or bad injectors.Also inspect your ignition timing and components in the ignition system for proper operation.All of these things are tied into the computer to assure proper operation.Allways start with the plugs and wires if they have alot of miles on them and then the fuel delivery system.I hope some of this info will help you narrow down your search for this problem.
Posted on Jan 30, 2011
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