1995 Saturn SC1 reving high at idle speed

Tiny
GIG420
  • MEMBER
  • 1995 SATURN SC1
Engine Performance problem
1995 Saturn SC1 4 cyl Front Wheel Drive Manual

i have a 95 saturn and idle the car is running at around 2000rpm the revs sometime settle back to normal but they will return to the high reving I am reveiving a code 25 from the computer but it really doesn't help me. I am thinking maybe a idle position sensor but hoping you can help me.
thanks GIG
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Saturday, April 25th, 2009 AT 10:43 PM

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Tiny
RASMATAZ
  • MEMBER
Try cleaning out the idle air control valve for a start and see what happens.
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Saturday, April 25th, 2009 AT 10:55 PM
Tiny
GIG420
  • MEMBER
I did take the throttle body off and remove the sensors and hit them with some throttlebody cleaner. I'm not sure which sensor is which but I took them both off and cleaned them best I could.
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Sunday, April 26th, 2009 AT 12:17 AM
Tiny
RASMATAZ
  • MEMBER
Here's how to clean the IAC valve:

Disconnect the air intake ductwork from the throttle body.

Start the engine, then increase and hold the idle speed to 1,000 to 1,500 rpm.

Spray the throttle cleaner or engine cleaner into the throat of the throttle body, aiming for the idle air bypass port (usually located on the side or top of the throttle body opening). Give this area a good dose of cleaner (about 10 second's worth).

Turn the engine off to allow the cleaner to soak into the IAC passageway.

Wait about three minutes.

Restart the engine, rev and hold at 1,000 to 1,500 rpm, and repeat the cleaning process again.

Turn the engine off again, and reattach the air intake ductwork to the throttle body.

Start the engine and rev and hold to 1,500 to 2,000 rpm until no white smoke is coming out of the exhaust pipe.

If this fails to make any difference, you can remove the IAC valve from the throttle body and spray cleaner directly on the tip of the valve and/or into the ports in the throttle body. Let the cleaner soak awhile, repeat as needed, then reinstall the IAC valve, start the engine and run it at 1,500 to 2,000 rpm as before until no white smoke is seen in the exahust.

If the idle speed still surges after this, the IAC valve is defective and needs to be replaced.
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Sunday, April 26th, 2009 AT 1:02 AM
Tiny
SSPHS666
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Is this the same as if you have a manual transmission and this happens when you push in on the clutch?
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Thursday, February 4th, 2010 AT 9:34 AM

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