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Old 05-12-2008, 12:51 PM   #1
2003MercMaraude
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Default Occasional low idle speed - ECTS and/or idle air motor?

Hi guys, forgive the newb question, but -- 77k mile 1993 SL2, sometimes likes to idle very very low when hot. After a while it will come back up to normal. Should I do both the ECTS and the idle air motor? Where is the idle air motor located on this car?

Thanks

Steve

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Old 05-29-2009, 03:35 PM   #2
OnMy4th
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2007 ION-2 Quad Coupe
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Default Re: Occasional low idle speed - ECTS and/or idle air motor?

Definitely the ECTS.

And while under the hood,

Check that the vacuum hoses are all solidly on.
Spark plugs changed yet? Ignition wires?
...
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1995 SL2 sold it at 213,000 miles
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Old 05-29-2009, 04:03 PM   #3
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Default Re: Occasional low idle speed - ECTS and/or idle air motor?

Check the ects first and replace it if its the original. The original ects can cause all sorts of engine/transmission problems if not replaced. The idle air control valve is part of the throttle body and probably works since you say the idle rises eventually. Only a stuck/broken iacv will keep the idle speed at one rpm so its not likely broken. All you need to do is clean the throttle body thoroughly.
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