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You've probably got a vacuum leak under your throttle body. I have an 88 c1500 with the 4.3 and it idled at over 1000 rpm all the time. Found out that it was a bad gasket between the t.b. and the intake manifold. It took about 20 minutes to replace and it idled beautifully afterward. Grab a can of carb cleaner too, it prolly wouldn't hurt.
It could also be the IDLE AIR CONTROL VALVE, easy to change, cost about 45 bucks at your local auto parts store.
What else can I help you with?
Lawn motor idles up and down?
Either the fuel mix is adjusted wrong or the carb is dirty
99 escort zx2 idles rough what do you have to check to find out what is wrong with it?
its a vacumn hose issue,,,need to look for a cracked hose at the rear of the motor,,down about half way .
What is wrong when the wiper blades do not work on a Chevy Corsica?
wiper motor or the bolts holding it tight.
If my car idles for a minute then dies what is wrong?
vacuum leak.
What would be wrong if a 1989 Chevy G20 van 350 motor runs good but has no power?
The timing is too low or it has the wrong spark plugs in it.
Engine idles up and down what is wrong?
It really depends on the make/model of your car. Suspects include: Idle Stepper Motor/control valve, engine CPU, fouled injectors, incorrect spark plugs
What is wrong when your virago starts good idles good runs good but dies at idle when warms up good?
If your Virago starts, idles, and runs well but dies at idle when warmed up, it may indicate a fuel delivery issue, such as a clogged fuel filter or a problem with the carburetor, like dirty jets. Additionally, it could be a sign of electrical issues, such as a failing ignition coil or a loose connection, which can affect performance as the engine heats up. Lastly, check for vacuum leaks or issues with the idle adjustment, as these can also cause stalling when the engine warms up.
What is wrong if your blower fan motor only works on high speed on a 2002 Chevy suburban?
blower resistor is bad
1988 Chevy Astro only blow air through the windshield what is wrong?
I have a 2003 astro with the same problem, it was the blower motor
What is wrong if a 1992 manual Chevy Cavalier idles rough jerks when in Drive and has white smoke coming from the exhaust?
U have a blown head gasket,cracked cylinder head or cracked block.. The white smoke is from water getting into the Exhaust system.
What could be wrong with fanblower for 2005 Chevy Cavalier that just stopped working?
The fan relay could be bad or the fan motor could be bad.
What is wrong if the windshield wipers on a 2002 Chevy Impala will not go down when you turn them off?
Replace the paulse board that's attached to the wiper motor.
