Question about Saturn SL2

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Myservice engine light came today rogh in idle at light rpms seem a little high this is a 98 saturn sl2 I think engine is a 1.9

Myservice engine light came on today on my 98 sl2 rough idle little shakeing at idle rpms a little high

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The check engine light means that a code has been set. the code will reference a faulty system that must be diagnosed and repaired. sorry for the vagueness, but there are e gads of codes that can cause the rough idling

most aftermarket parts places will scan the car for free. this will give you an idea of where to start.

Posted on May 12, 2009

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Stays at a high idle when driving and stoping


Check your idle air control. If it does not work properly, it allows extra air into the engine and brings you engine RPMs up.

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You'll need to get the trouble codes to see what is the problem. Many auto parts stores will pull the codes for free - I'd start there.

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I have a 98 Saturn SL2 with 230,000 miles. It runs great and gets almost 40 MPG highway. The only problem I have is that the idle speed varies from about 600 to 1700 RPMs as if I were revving the engine...


I would check the TPS (throttle position sensor) as that would cause a jump and decrease in idle when sitting in park, or in drive with foot on brake. Im not sure exacly where it is located on your car, but they are usually on the passenger side of the fuel injection system.

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yea it sounds like someone like most wanna be mechanics take a torques screwdriver and run the idle screw up on the throttle body instead of fixzing the real problem also you may want to concider testing and changeing the TPS

Jan 17, 2010 | 1998 Saturn SL

1 Answer

Just bought a 98 Saturn SL2 that is in excellent shape but high miles, mostly highway miles. It has 210,000 miles on it but was well taken care of and sounds and drives great. Had a new transmission put in...


Hi Darlene,

These engines can go well beyond 500,000 miles, and I know several people that can attest to that. There is one important thing you must know. ALWAYS check your oil at every gas fill up! Your SL2 is probably burning oil and needs to be checked. If you let it get too low you will spin bearings in the engine and it will be rendered useless. Check the oil and keep it at the top of the hatchmarks. It's a good idea to get two quarts of oil and leave them in the trunk this way you can fill as you need it.

The idle is probably the Idle Air Control valve (IAC). It is probably dirty and needs to be cleaned. Removing the throttle body and cleaning with carb cleaner to get the carbon off will get your idle working again. You cannot reset idles on these car and DO NOT touch the idle stop, that is not how idle is managed nor adjusted. The idle should be 1,200 RPMs cold and 800-850 warm.

Thanks,
Joe

Jan 17, 2010 | 1998 Saturn SL

1 Answer

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Your 2002 Saturn car has an electrical recall .I think its the ignition modual.Owners should contact saturn @ 1-800-553-6000, Prompt 3
Please remember to rate my help in this matter ! Thankyou!

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