Truck WILL NOT idle at all. Cold, warm, hot,...anytime, if i take my foot off the pedal, it just quits. and this is in park....forget about putting it in gear. Getting gas okay. Sometimes hard to start, but will start, just won't idle. No high idle when start cold. Has been sitting for some time in back yard. 1989 Chevy Blazer, Silverado, Full Size, 350 engine, 4x4.

Check the help links related to this problem.Click the link below to go through its troubleshooting procedure :-----Idles rough and quits when gas pedal is pressed less? http://technoanswers.blogspot.in/2012/01/1999-ford-f-150-idles-rough-and-quits.html---------
Car won't start without hitting the gas pedal? http://schematicsdiagram.blogspot.com/2011/12/car-wont-start-without-hitting-gas.html
-------Complete loss of brake pedal then all gets normal? http://repairhelpcenter.blogspot.com/2012/01/complete-loss-of-brake-pedal-then-all.html
------Car dies when gas pedal is pressed? http://schematicsdiagram.blogspot.com/2011/12/car-dies-when-gas-pedal-is-pressed.html
--------Pushing on the gas pedal, but the car slows down? Gas pedal to the floor and the car slows down?

http://technoanswers.blogspot.in/2012/02/pushing-on-gas-pedal-but-car-slows-down.html

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After replacing brake rotors and pads, brake pedal remains on floor? http://technoanswers.blogspot.in/2012/02/after-replacing-brake-rotors-and-pads.html

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accelerator pedal sensor? http://technoanswers.blogspot.in/2012/02/2009-chevy-impala-accelerator-pedal.html

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For rough idle issues and problem troubleshooting,go through the help links provided below :----- van idles rough?

http://howtobyme.blogspot.in/2012/01/2004-ford-freestar-van-idles-rough.html

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will not idle when cold?

http://technoanswers.blogspot.in/2012/02/ford-explorer-40-will-not-idle-when.html

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runs lean and idles rough?

http://technoanswers.blogspot.in/2012/02/ford-runs-lean-and-idles-rough.html

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Engine stumbles coming off idle when warm?

http://repairhelpcenter.blogspot.com/2012/01/engine-stumbles-coming-off-idle-when.html

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Erratic idle on car?

http://schematicsdiagram.blogspot.com/2011/12/erratic-idle-on-car.html

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Low idle when cold out side?

http://repairhelpcenter.blogspot.com/2011/12/low-idle-when-cold-out-side.html

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Idle Air Control (IAC) Valve Replacing?

http://schematicsdiagram.blogspot.com/2011/12/gmc-idle-air-control-iac-valve.html

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Engine quits at idle?

http://repairhelpcenter.blogspot.com/2011/10/engine-quits-at-idle.html

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Car overheats and Air blows hot at idle?

http://howtobyme.blogspot.com/2011/11/car-overheats-and-air-blows-hot-at-idle.html

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While stop engine idles like cylinder missing?

http://schematicsdiagram.blogspot.com/2012/01/while-stop-engine-idles-like-cylinder.html

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This will help.

Thanks.

The choke function is not working on a cold engine.
1 clean throttle body and IAC motor air pathways.
2. Check for engine codes, you are looking for a code that relatws to the wngine temperature sensor.

What this sounds like is the throttle position sensor, or TPS. When this sensor goes out, you will experience the high idle that will not taper down. The good news is that they are fairly inexpensive and easy to replace.

I have the same problem. When my dealer changed my coolant I now seem to have a stuck thermostat. They are denying they did it. I haven't changed the thermostat yet but that is the problem.

There seems to be several issues. Can't say a lot about the gauges not working except that relays power groups of equipment functions and if a relay does not provide power then the gauges can't work.

For a fast idle, a sequence called the "cold start sequence" is suppose to increase idle. This is triggered by an engine temperature sensor. Some cars have 2 with one working the dash gauges and the other is used to work the engine controls. Yours is likely either sending a signal that the engine is hot (and it is not) or the signal is missing.

When the engine knows it is cold, the idle will speed up until the engine is warm.

The dim headlights can be dim from a power drain, or the engine is not idling fast enough to charge.

When replacing the IAC it is a self learning item the computer will teach. You need to do this to fix this problem first since you DID replace it. Have the engine good and cold (not hot) let set three hours if warm. Now we are ready. Place the parking brake on. Start the engine. Put your foot firmly on the brake. Put the car in drive. You will not go anywhere for the next proceedure. I do hope you have a tachometer. You will need to rev the engine in gear between 1100 & 1299 RPM's and hold it there for 5 minutes. This is the proceedure to have the self learning codes from the switch to the vehicles computer stored. When your done this truck should idle at 800 rpm's

sounds like either fuel pump weak or fuel filter plugged

Hi first check for any loose hoses or wires but if everything looks ok then check the idle speed control this may have to do something with the idling problem

possibly the coolant temperature sensor is faulty

anytime