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Low idle at start up and high idle when engine warm 700 1987

posted by  nanolund on  Mon Nov 25 22:55 CST 2002
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On cold mornings the engine idles at 500rpm or below but when driving for about 10 minutes or just coming off the freeway the idle shoots up to 1500-2500rpm. Have checked the faqs re TPS but cant fully understand what a throttle plate is, I presume this is the springy metal strip that touched the body of the throttle pully thing (again I don't know its proper name). I have to kick the gas pedal rapidly to bring down the revs.

3)questions:
a) Is there a cure?
b) What are the consequences if I disconnect the throttle microswitch?
c) What is the function of the throttle microswitch?

regards.






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