Question about 1999 Saturn SL

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How do you turn down the idle on my saturn 99

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Replace the idle air control valve
the computer run it only
no adjustments can be made towards the idling

Posted on Feb 07, 2010

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1 Answer

99 saturn races at startup, almost dies at idle


it's the iac solenoid, ( idle air control solenoid ), try to tap on it if it idles when you do that then replace it

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99 saturn loud revving sound in engine


Start the car and use a spray bottle to spray a bunch of water mist around the top back of the engine where the intake meets the head. If it starts to die you have an intake manifold leak. It\'s kind of a pain to change, but not really technical. Also, clean your throttle body and clean the idle air controller (IAC). Alos consider replacing the Throttle position sensor (TPS). Both are located on the back of the throttle body.

Dec 02, 2012 | 1999 Saturn SL

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1995 saturn sl1 turn idle down


how do i turn the idle down on saturn sl 1995

Jul 22, 2012 | 1999 Saturn SL

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99 sl1 with 1.9 has high idle and will not idle below 1200 in drive


remove the throttle body (4 bolts) and then remove the idle air control (bolted to the TB, between the firewall and the throttle body)-clean the TB, the Idle air controller and remove the Throttle Position Sensor (opposite the IAC) and clean it if necessary. The IAC carbons up on these cars, as does the Throttle body-I know, I have a 99 SL with 180,000 miles, it is almost like an oil change as they get older.

Feb 18, 2011 | 1999 Saturn SL

1 Answer

Have a 99 Saturn, rough idles, stalls, high RPMs when first started, then idles to rough idle, what is the first thing I check?


Sounds like the EGR is hanging open causing an internal vacuum leak.... Check all vacuum lines first for cracks / splits and then pull the EGR and make sure the pintle is not stuck open with a chunk of carbon.

Oct 15, 2010 | 1999 Saturn SL

1 Answer

My car ran fine but all at once it started missing and the ioling would go up and down...then when i went to start it the next day it would turn over but wont start 99 saturn station wagon


It seems like a bad idle Air control Valve or an Idle position sensor. The best way is to get a trouble code for free at most autoparts stores and they will tell you what might be wrong.

Nov 20, 2009 | 1999 Saturn SL

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My '99 Saturn SL Check Engine light turns on constantly. It sounds like it wants to stall when I come to a stop. Also, if I turn on the ac, the rpms don't stay steady. Could it be my transmission?


something in the air fuel management. check the hose from the air cleaner to the throttle body.there is a sensor on that hose,that if the seal is no good,will cause idling and running problems.

Nov 05, 2009 | 1999 Saturn SL

1 Answer

1996 Saturn dbl overhead cam -idle is extremely high -turned down idle screw all the way -still revs -help!


you should not mess with idle screw, you are changing tps values,computer controls idle,check for vacum leaks,may be a hose or intake gasket.

Sep 19, 2009 | 1996 Saturn SL

1 Answer

Saturn '99 SL2 erratic tickover on idle


Idle problem most likey a Coolant Temp sensor & connector.Cam covers very common to leak around the sides & down into the spark plug holes.Also all saturn s-series 1.9 engine consume oil.Most 1qt. per 1500 miles some more some less.Service Engine Lamp has nothing to do with regular maintenance.It's a malfunction indicator lamp.If it's on there is Trouble codes stored in the ECM.Auto zone free scan with printout.Hope that helps

May 12, 2009 | 1993 Saturn SL2

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99 saturn sl1 hard to start if sitting for over an hour


you have leaking fuel injectors they are fouling out plugs.

Apr 22, 2009 | 1999 Saturn SL

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