» » »

Geo Q&A

Ask Your Question

1996 Geo Prizm Question: Engine starts but won't accelerate



, 1.8L 4 Cylinder, Cedar City, UT, January 25, 2010, 13:13

The engine quit without warning on the freeway and now will start and idle but dies as soon as the accelerator is pressed. Diagnostic code shows a bad ignition module and main computer but replacing them makes no difference. We have had it to two different shops and both are stumped. The original engine blew a head gasket and was replaced with a lower mileage but identical engine about six month ago. Compression, plugs, etc. all check out OK.

1 Answer
Flag This
  • Answer #1

    January 25, 2010, 14:57

    How good is your fuel pressure? I would check that first with a really good gauge set. Then I would make sure the Throttle Position Sensor is working and I would use a lab scope to do it.

    Flag This