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Idle Issues

3903 Views 13 Replies 8 Participants Last post by  fschevy1988
Just want to know what you guys think the most common/first place to look would be. I have a 1993 K1500 Burb. It idles great when you first start it, but after driving for a while then driving around the parking lot when you let off the gas the idle will drop like it is going to die (it never does completely die) then comes right up where it should.

From what I hear it could be, EGR Valve, MAP Sensor, Fuel Filter, or Fuel Pump. I don't mind replacing them all, but am trying to save a little money this month and need to take it on a little trip for Thanksgiving. So replacing the culprit the first try would be nice.


I am hoping its NOT the fuel pump :grrrrrr: DON'T want to drop the tank!!!
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not to be an a$$ but have you checked the computer for codes? that be a good start. i just got a truck that a mechanic of 35 years told the customer the head gasket was junk and he wanted $2000 to fix it so they dumped the truck to me for free. i started it and the cat went to bright red on the pass side and it was boiling the heater hoses. i put the code reader on it and the ignition moduel failed it test. i replaced and all was good and i tried to give it back to the owner but they said it is yours and it is now going to the Youth group of our church for money for the group. sometime the computer will tell you wat is wrong (some times it does not but a good starting point)....mike
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