Question about 1993 Saturn SC2

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Saturn sc 95 idle is not stable/ going to die

The car runs ok but when i'm on stop the idle is not stable and the engine going to die. so, i step on the gas pedal all the time while i,m on stop coz i'm scared not to start.

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  • carynmllres Nov 13, 2008

    I have a 2001 Saturn and have the same problem. Any solutions???

  • teleman001 Jan 05, 2009

    My daughters car has the same problem. I already replaced the temp sensor because the cooling fans werent coming on soon enough in the summer, now this. What a PITA these cars are! And trying to find someone to work on a Saturn is about impossible! There are no dealers close to me and the last one I had it to charged me a grand to diagnose and replace a faulty gear position switch. What a joke.

  • etaks Jan 14, 2009


    • 1993 saturn sc2 wants to stall at stop signs/ idle. Also (floods?) out if you drive a short distance and shut it off

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You might have carbon build up on the throttle plate, take your breather off, spray the heck out of it with some carb spray and also down in the IAC really good. The when you start it, you will have to floor it until all the black smoke is gone. Then take it out on the highway as you are in a Nascar race.
Also your egr valve might be stuck open, and even a intake vacuum hose leak. you EGR being stuck open with cause you a rough or if any take off. Take the EGR off and check it for carbon build up also, if so try to just scrape it off. If thats not possible, youll have to replace the EGR valve, those on that car vary around 130.

Posted on Mar 05, 2009

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There are more than one temp sensor on these cars. You need to get a diagnostic reading on it. Most part stores will do the diagnostic check for free because they want to sell you the part, rather than the dealer. So get your reading then replace. I have had 2 different heat sensors go out on mine. Also if your not sure how to replace autozone has a fix it your self section after picking the part go to the bottu and click on fix it your self. A free repair guide. If not purchase a Chilton and go for it. Those books are great.

Posted on Feb 02, 2009

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I have the same problem with my 1993 Saturn SCII. The only way to restart the car is to sink the accelerator all the way to the floor when starting (if it starts at all). It is with my mechanic right now. I have been searching for solutions and came across 3 very probable solutions:

ECTS (PCM temperature sensor) check first
TPS (throttle position sensor)
IAC (idle air control)

Posted on Dec 09, 2008

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