Have trouble starting unless i leave it sit for a while in between starts. Temperature guage reads at half way on the guage right after i start it and while driving it jumps around. Right off the start idle reads about 800 rpm and will continue to ethier read hig or low at stop signs. manual transmission.
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Re: low idle in 1998 saturn sc1
I had this problem. Its a sensor. Unfortunately I don't remember the name of the sensor. When it gets a tiny litle crack in it, this is what happens. If you take it in to autozone, they will do a free sensor scan for you. You can replace it yourself. Its really no big deal. If you get the scan done you can contact me and I will give you further info.
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Check to make sure that one of the pulleys are not sticking on your serpentine belt line, or better known as the belt drive. Such as an alternator that is that seizing up, or a bad power steering pump.
first get it scanned for codes 2nd look at the air filter, and the mass air flow unit sitting on top for leaves or dirt , then check the air intake bellows that runs to the intake check it for cracks? also look and listen for vacum leaks around the engine possible cracked hose causing ecm to get false signals from airflow meter? good luck
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
check coolant temp sensor located at driver side end of cyl head. remove sensor and check or cracks. also check connector for corrosion. if cracked, go to dealer for replacment. they eill sell you a new designed metal sensor to replace your cracked plastic one. dont buy aftermarket, they will not be accurate. cracked sensor will cause eng. to run rich. may start ok cold but not when hot.