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Use a code scanner to find out what's wrong. Don't just replace parts without figuring out what's wrong first. Code scanners do not always 'tell the whole truth. I have a 1993 SL1 1.9l code scanner gives code 12. Which means OK on the sensors. Trouble is, as I use the foot throttle to increase engine speed to about 3400rpm, it immediately drops down to about 2500rpm and starts up on rpm until 3400 and than drops again. I am maintaining steady pressure on the foot throttle, by the way. Even when the car is parked in the driveway. Found out by electrical tests on the TPS and the MAP sensors and using a timing light, that the spark retard circuit is not working. I still have that to fix. Does your vehicle act the same way?

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โˆ™ 2008-02-13 07:33:32
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Q: Your Saturn runs like poorly and you changed all the sensors what else can it be?
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