1997 Saturn SC1 Engine misfires when cold and accelerating

Tiny
JPG954
  • MEMBER
  • 1997 SATURN SC1
  • 4 CYL
  • FWD
  • MANUAL
  • 155,000 MILES
I drive my car down the street and has not been driven for at least 12 hours and the gauge is cold and I press the gas and I get and a constant misfiring when I am accelerating, unless I let go of gas. Then I press on gas again and it will keep missing until it gets warm ( operating temperture ), well at least most of the time.
Sometimes when it is within operating temperture it will misfire on and off as I am accelerating but only sometimes.
Also when it is missing the service engine light would blink on and off for about 30 seconds and go off after it stops missing. Im unable to get any codes when I scan because the service engine light will not remain on.

I replaced my fuel filter and cleaned my air filter and throttle body and replaced spark plug and wires and used fuel system cleaner a few times. I also disconnected the negative battery cable to reset the computer and reconnect it and drive it and I do not get any misfire until the computer relearns itself. I'm really not sure what it could be please advise.

thanks
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Saturday, August 28th, 2010 AT 10:06 PM

3 Replies

Tiny
SATURNTECH9
  • EXPERT
If your engine light is missing then you should have code's a miss fire one's. Try and have the code's read again and let me know the number's are.
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Saturday, August 28th, 2010 AT 11:36 PM
Tiny
HENDO420
  • MEMBER
Ive been having the same problem with my car for over a year. It runs ok only when its about 60-70 degrees outside, any colder or hotter and it missfires and I can smell gas in the cab. Really rough acceleration, no power unless the rpms are over like 2.5-3k. It jumps around alot. I cant check for codes anymore because there seems to be no power to the obd2 plug and all the fuses are ok, so no idea why theres no power to the plug =/ The only codes I had b4 that was a bad cam shaft position sensor, but it ran fine then. It started missfireing and running rich about the time I blew my heater core, I just bypassed it because I couldnt afford to put another one in at the time. Could bypassing the heater core cause problems? 0.O
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Wednesday, October 20th, 2010 AT 12:57 AM
Tiny
SATURNTECH9
  • EXPERT
It doesn't sound like the exact same problem as the person that posted there question. If you could please post your own question with all the detail's like year make model etc that is not on someone else's posted question then I will be more then happy to help you out with your car. Thanks in advance for your understanding.
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Wednesday, October 20th, 2010 AT 11:16 AM

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