1995 Saturn SC1 fast idle

1995 SATURN SC1
167,000 MILES • 4 CYL • FWD • MANUAL
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BSARAINO
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i used fuel injecto cleaner and filled my tank. now its idleing at 2500 rpm and stays in that area even after it warms up. should i try a new oxygen sensor.
Oct 21, 2010 at 7:45 PM
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SERVICE WRITER
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Was the problem present before you tried your concoction?

I would look for a vacuum leak first.
Oct 21, 2010 at 7:49 PM
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BSARAINO
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after using stp fuel injector cleaner and filling my tank the car started to idle at about 2500rpm and stayed that way after warm up. should i try replacing the oxygen sensor.
Oct 21, 2010 at 8:12 PM
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I wouldn't replace the o2 sensor unless there is good reason. I doubt the STP treatment is related. Should check for codes, if none present I would next look for a vacuum leak. I have seen the engine coolant temperature sensor cause odd things like this as they crack.


https://www.2carpros.com/forum/automotive_pictures/30961_saturn_CTS_4.jpg

Oct 22, 2010 at 4:55 AM
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BSARAINO
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i cleaned the oxygen sensor and it runs smoothly now
Oct 23, 2010 at 2:59 AM
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Good News....I really wouldn't have expected it. Must have been one heck of a lot of carbon.

I have a hard time assuming that because x happened that is is related to y. This was truley related.
Oct 24, 2010 at 6:13 AM