89 rex Idle prob
#1
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Join Date: Mar 2007
Location: Lodi, CA
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89 rex Idle prob
when i start the car up when its cold it revs up real high (to about 3000 rpm) then goes down after a little while, but when i start it up then put it in gear the idle goes down to normal. when the cars warm and i start it up it does not do this. TPS? i dont know. how can i fix this? thanks in advance for any help
#2
Rotary Gearhead
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There is nothing wrong....this is how Mazda designed it. There is a device called the Accelerated Warmup System that is used to have a high idle to get the catalytic converters operational earlier than without the system. There are threads about this on the forum and a complete explanation in the factory service manual. When you shift into a gear with a cold engine, the system is defeated.
#5
Originally Posted by Bvaldez
when i start the car up when its cold it revs up real high (to about 3000 rpm) then goes down after a little while, but when i start it up then put it in gear the idle goes down to normal. when the cars warm and i start it up it does not do this. TPS? i dont know. how can i fix this? thanks in advance for any help
you are one lucky bastard. i wish my car can do that. i gotta manually idle mine
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