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Old 06-28-2012, 09:55 PM   #1
xMasterJPx
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2000 SC1
Attention 2000 Saturn SC1 High Idle when parked!!! Need help!

Ok so lately my RPM's have jumped over 2000 when I park my car and it started happening about 2 weeks ago and now it's happening more often as i drive and then park. if I just start my car, my RPM's are normal!

Any idea what may be the problem? I'm gonna be cleaning my throttle body cause idk if it's ever been clean and my car is sitting at a 140K, but I don't want my car to fail on me because of this! Can anyone help me out in figuring out how to fix this issue?
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Old 06-28-2012, 10:09 PM   #2
martensitic
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Default Re: 2000 Saturn SC1 High Idle when parked!!! Need help!

I had the same symptom and it turned out to be a bad throttle position sensor (TPS). Any trouble codes on the computer?

Throttle body cleaning also won't hurt while you're in there.
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Old 06-28-2012, 10:34 PM   #3
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2000 SC1
Default Re: 2000 Saturn SC1 High Idle when parked!!! Need help!

no not at all, funny thing is, I'm getting no engine light, oil light nothing!

i'm also gonna be doing a seafoam clean up this weekend as well!
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Old 06-28-2012, 10:44 PM   #4
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Default Re: 2000 Saturn SC1 High Idle when parked!!! Need help!

When it happens, turn the car off, then on again. If this fixes the problem your TPS is faulty.
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Old 06-28-2012, 10:46 PM   #5
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2000 SC1
Default Re: 2000 Saturn SC1 High Idle when parked!!! Need help!

good thing the sensors cost only $40 if that's the case
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Old 06-28-2012, 11:09 PM   #6
ssewall
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Default Re: 2000 Saturn SC1 High Idle when parked!!! Need help!

You'll want one from a junkyard. The aftermarket TPS are known to be flaky.
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Old 06-29-2012, 04:02 AM   #7
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Default Re: 2000 Saturn SC1 High Idle when parked!!! Need help!

Mine isn't flaky after a year, and it has a lifetime warranty from O'Reilly Auto.

However, O'Reilly has the part numbers for the different years mixed up in their computer, so make sure that the part number you get matches the original.
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Old 06-29-2012, 06:08 AM   #8
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Default Re: 2000 Saturn SC1 High Idle when parked!!! Need help!

Did you ever replace the original round nosed plastic coolant sensor with a flat nosed brass one?
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Old 06-29-2012, 09:09 AM   #9
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Default Re: 2000 Saturn SC1 High Idle when parked!!! Need help!

i hate being a broken record, but the top 2 causes of idle irregularities i've seen are 1) egr valve (clean it or replace it) and 2) intake manifold gasket, especially on single cams. spray carb cleaner around the intake gasket (back of motor) while the car is running, and if idle changes or car stalls while you're spraying, you've found the leak and the cause of your idle problem. TPS is almost never the cause in my experience. let us know how you solve it so we can all learn.
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