Question about 2005 Saturn ION

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Engine races up to 3K rpms. Seems worse in the cold. I have to turn the engine off, wait and turn it on to stop it from racing.

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Idle control selanoid

Posted on Mar 22, 2011

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1 Answer

Driving along makes a very loud noise like motor is racing, but continue driving, noise goes away then starts again???


Please take a look at your Engine's RPMs when this is happening and let us know, as it will help with the diagnosis. If the Engine RPM is stable (not high during the periods of the racing engine sound), then it sounds like your Radiator Fan clutch may be going out. The noise you are hearing is the fan kicking in and blowing a lot of air, which in turn sounds like the engine is racing.

If the RPMs are increasing with the racing engine sound, it could be the transmission/(clutch if manual trans) slipping.
Hope this helps!

Jun 28, 2015 | 1993 Mercedes-Benz 190

1 Answer

Idle races when cold


Check your Idle Speed Control Valve,or any vacuum hose leaks.

Aug 24, 2012 | 2001 Jeep Grand Cherokee

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Engine racing even when parked at red light! Goes


check ur idle air control valve(iacv) or purge valve both affect idleing

Mar 15, 2010 | 2001 Chevrolet Silverado 2500HD

1 Answer

Engine races


COULD be the TPS sensor or could be more serious

Mar 05, 2010 | Saturn SC2 Cars & Trucks

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Gas pedal Problem


needs to have the throttle cable ether replace or greased with a frezze protection

Dec 20, 2008 | 2007 Ford Focus (3 Door) Hatchback

2 Answers

Engine Racing


It may be the cruise control cable - I had a vehicle do this to me before. The engine raced as soon as I started it, even in park. A couple of times, it stopped racing - then I pressed the gas pedal, and the RPMs did not drop when I released the pedal.
If it acts somewhat like that, check under the hood and find the cruise control system - it is most likely a 3-4" diameter, 5-6" long cylinder-like object mounted on top of the engine with a long cable coming out of it going toward the back of the engine. Check all of the clips on the cable and make sure they are intact, then make sure the cable is fully attached to the throttle body at the end. My cable came loose and got itself wedged in the throttle body, preventing the throttle from closing.
If the cable seems fine, check for other obstructions on the throttle body - there may be something else holding it. It may help to have somebody inside the car pressing and releasing the gas pedal (engine off), so you can see whether it fully opens and closes.

Jun 19, 2008 | 1998 Mercury Sable

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