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High Idle speed can happen due to few reason. Normal Idle speed should be 800-850 RPM. First check the air hoses for any leaks. Clean the Idle control valve. Then check the throttle position sensor under the throttle body. Check the accelerator cable cable and stop position (do not try to change the original stop position). I hope these will help.
Answersometimes a vacuum leak can cause the idle to be a little higher then normal . .. other symptoms of this are a decrease in over all proformance . . .to check it, try clamping down on each vac line that you can see with vice grips, use a lighter setting on the plyers and use a piece of rubber so you don't damage the rubber vac hoses
Steve !!
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∙ 12y ago
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Can a bad battery cause a car to idle high?
No, that has nothing to do with idle speed.
What can cause the car to stall when running the ac?
An engine usually has a higher idle speed when the ac is running. If the high speed idle does not operate then the ac will cause the engine to stall.
How do you adjust the idle on a 2003 Dodge Durango 4.7L engine?
Idle speed is not adjustable. It is controlled by the engine copmuter. If your idle speed is too high or low you have a problem with a sensor or the idle air controll actuator. Also, a weak battery can cause the idle too be erratic
What can cause 1989 Ford F-250 to idle high?
a vacuum leak can cause high idle
What would cause your transmission to jerk when going from neutral to drive in my 200 Pontiac grand am?
Idle speed too high.
Will a vacuum leak always make your engine run rough?
No, on a fuel injected engine it can cause high idle speed.
On a 1991 Nissan maxima Idle is good at starting car then the idle goes up high for a while then is up and down?
A faulty camshaft can cause your 1991 Nissan Maxima to idle erratically. A diagnostic test could verify the cause of the improper idling speed.
What happenes if the Idle speed in a car is too high?
the engine runs at a faster rate than when the idle speed is lower.
How do you adjust the idle speed of a 1993 jeep wrangler the idle is set to high?
Idle is computer controlled and can NOT be adjusted.
How do you adjust idle on 1998 ford escort?
You don't. The ECU controls the ISC (Idle Speed Control Motor) which adjusts the idle. If idle is out of control (too low or too high) try gently tapping the ISC with a small (0.5 pound) hammer or a large wrench while the engine is running. If tapping the ISC makes a change in idle speed, you need a new ISC. Clean the throttle body whenever replacing the ISC. If the ISC is not the problem, look for vacuum leaks which can cause both high and low idle. Low coolant level can cause high idle. Also, note that many clueless drivers assume that the idle is wrong (high) when the car is just using high idle (normally) for a short time after a cold start especially in cold weather.
94 SC1 how to adjust the idle speed The rpm's is at 1600 at idle speed to high?
change the TPS Throttle Position Sensor
What can cause 88 Ford F-350 to high idle?
You can adjust the idle.
