Question about 2002 Saturn Sl

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2002 Saturn SL 2. Idle at 1800 rpm. With ac. 1400 rpm. When up to temp. Replaced temp sender an idle control valve. Code sea idle too high. Computer reads

Computer reads. Idle too high. When pushing on IAC input plug or pull on wire loom along injector tube, idle would return to 850. Might stay down for an hour or days then reverts. Recently, pulling or pushing on wires has no effect. Originally Thot was IAC pigtail. No more?? Computer reads "0" telling ISC to close bot IAC not respondinfg. Replaced temp sender and IAC. No effect

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  • Master
  • 2,101 Answers

It sounds like the ignition crntrol module

Posted on Nov 02, 2012

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Posted on Jan 02, 2017

cbaroni78
  • 44 Answers

SOURCE: high idle 1997 Madza 626 4 cylinder auto transamission

The PCM controls idle speed to ensure good driveability. The PCM will only attempt to maintain the desired idle speed when it “knows” the throttle is closed. A throttle switch or the TPS input is used to determine when the throttle is in the idle position. Motors and solenoids are used by most PCM’s to control idle speed. Many PCM’s are programmed to attempt to control the idle speed by adjusting spark timing and then by controlling the idle speed actuator. Some computers of the early 80's did not control idle speed.

Posted on Oct 19, 2008

MobyMech
  • 106 Answers

SOURCE: miss fire #3 cyld. compression 125psi idle speed 2500 rpm

Hi

A faulty IAC would cause a random misfire rather than a misfire in a specific cylinder, as would an intake air leak, both of which would cause a high idle amongst other things.

Run the engine until its good and hot, disconnect the injector harness plug so the injectors are disabled, remove all the spark plugs, disable the ignition by unplugging the wiring connector(s) from the coil pack(s), and then carry out another compression test on al the cylinders.

If the compressions are now all relatively the same then you very highly likely have a faulty injector in cylinder 3.

Very best regards

Geordie

Posted on Jun 28, 2008

  • 77 Answers

SOURCE: Saturn SL 2002 High Idle

Intake manifold gasket. Leaking where intake meets head.

Posted on May 07, 2009

  • 186 Answers

SOURCE: will not start after it stalls untill about 5-10 minutes

Your problem is most likey your intake gasket.They have a problems on the SOHC engines where the intake gasket shifts & starts leaking vacuum at the #1 intake runner causing a missfire on Cylinder #1.While the engine is Idling buy some throttle plate cleaner & spray throttle cleaner down at the #1 Intake runner where the intake meets the head.If engine stalls or runs rougher that's your problem.I have replaced dozens of those gaskets for tha reason!! They have a beter design gasket through saturn parts.It has a coating on it to prevent reoccurance.Also you should check you Coolant Temp Sensor,if it's ceramic it's most likely bad.Replacement is brass from saturn.Good Luck

Posted on May 12, 2009

  • 1 Answer

SOURCE: idle out of control.

check all your vacuum hoses and the throttle body itself for a vacuum leaks if the hoses replace as nessasary if to check for throttle body get can of carb cleaner and spray around base of throttle body and sides not in it if idle raises you have a vacuum leak goto a good parts store and ask for a rebuild kit don't goto auto zone or advance they don't carry them

Posted on Oct 18, 2009

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I have a 2002 taurus idles high from 1000 to 1800 rpm's, 2-5 seconds when hot or cold then comes down to correct idle, happens on start up or driving. Suggestions?


chech engine light is letting you know that the idle air valve has been disconnected. looks like you have a bad idle air valve.

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In my 2000 Saturn SL1 I am experiencing very high idle (2000 rpm warm - higher cold). I have cleaned the throttle body and the idle air control valve with no improvement. What next, replace the idle air...


You could try replacing the idle air control valve but I would obtain one from a local salvage yard, its cheaper and you are not certain if thats the problem, another thing i would check is your intake manifold gasket where it meets the cylinder head, if tha gasket is cracked or leaking it will allow excess air to enter the engine and make it idle higher, the easiest way to verify this is get a can of carb and choke cleaner and spray it all around the intake gasket area, if the engines idling characteristics change drastically then the gasket is bad and needs to be replaced if theres no change in the idle I would start looking for vacumm leaks and the idle control valve issue, which you specified.

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you have a bad temp sender,if this does not solve the rough idle than you have multiple issues and your idle control valve is not functioning properly try removing and cleaning it.its also referred to as IAC (intake air control)

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1991 Saturn SL SOHC has two strange conditions that I can't figure out. First, the car seems to have a slight but constant acceleration at any speed under 30mph, and second, when you put the car into...


the idle air control valve can cause the symptoms your describing and it may not set a trouble code have it replaced and see if that repairs your issue

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I have a 2002 Saturn SL also. I bought it


check the throttle position sensor and adjust idle control.

Oct 02, 2009 | 2002 Saturn Sl

2 Answers

Saturn SL 2002 High Idle


Intake manifold gasket. Leaking where intake meets head.

May 07, 2009 | 2002 Saturn Sl

1 Answer

Idle out of control.


check all your vacuum hoses and the throttle body itself for a vacuum leaks if the hoses replace as nessasary if to check for throttle body get can of carb cleaner and spray around base of throttle body and sides not in it if idle raises you have a vacuum leak goto a good parts store and ask for a rebuild kit don't goto auto zone or advance they don't carry them

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2002 Saturn SL idle too fast 2500


more than likely its your Engine Coolant Tempature Sensor (ECTS) sound strange but its a common problem with saturns the part cost from 10-20 dollars and takes about 15 minutes to do

Feb 08, 2009 | 1999 Saturn SL

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