Question about 1984 Pontiac Fiero

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1984 pontiac fiero 2.5 litre automatic.when motor is completely cold and when started,it runs at fast idle at 2500 rpm.it will not idle down untail it reaches a specific temp./ or warms up.this can take up to 5 minutes irregardless of out side temperature.do i need to have it scoped-could it be a specific sensor.or a fast idle selinoid

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  • 47 Answers

I would check the thermostat. Sounds like it is stuck open.
In open it takes longer to warm up the engine.

Posted on Sep 12, 2010

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