Question about 2002 Saturn Sl

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Battery died and replaced but now hard shifting, high idle and will suddenly quit running. Could this be the ECM?

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Sounds like the air intake manifold gasket getting bad. Easy way to test this is when it is idling high, take a can of brake cleaner and spray it on the air intake, all around the gasket. If the gasket is bad, the car will change it's idle as the cleaner is sprayed on it. This happened to both of my 02 saturns. The air intake manifold gasket is located on the back side on the top of the motor. Very easy to get at and a very easy test. To locate it , look for the throttle cable on the throttle body. Look to the left of that and you will see the air intake. It's an aluminum manifold held on by 8 ten mm nuts. Right behind the fuel injectors. You can also use ether or quick start, and it wont take much. If the idle changes, you intake gasket is bad. Let me know how you make out

Posted on May 13, 2015

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SOURCE: 95 saturn sc1 all of a sudden had engine light on

You either have a bad engine coolant temp sensor & connector.Located under upper radiator hose at cylinder head Yellow & black wire.Original sensor is ceramic & replacement will be brass from saturn.Also you may check for vacuum leaks at PCV hose & valve.Hope this helps

Posted on May 16, 2009

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There are many other possibilities causing these idle issues. Engine idles rough.

There are few help links with solutions to troubleshoot such idle issues.

I suggest you refer the link below and follow its troubleshooting details:------

Click the link below:-----

Ford Expedition IAC valve replacing

http://technoanswers.blogspot.com/2012/12/ford-expedition-iac-valve-replacing.html

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