Question about 1997 Plymouth Breeze

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What's your problem?hi idle at start of car

Car starts up at high idle then decrease

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How high of idle? most cars start up anywhere from 1500 ish and then drop off once they get the proper readings, could be temperature sensor

Posted on Feb 13, 2012

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Posted on Jan 02, 2017

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1 Answer

How do I decrease idle speed?


The higher idle speed is part of the "cold start" sequence. It is controlled by the thermostat and a temperature sensor. You may need to change them both for faster action.

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This is normal. All vehicles idle high at start up to get the engine to operating temperature. This is known as open loop. The computer ignores signals from O2 sensors to keep your engine running safely. Once it has warmed up, it will enter closed loop, and you will see a decrease in idle.

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Could be a faulty idle air control valve.
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I turn on ignition and vehicle starts to idle real high seems like accelarator cable is sticking


Hi Clucas, If you're talking about a cold engine, the vehicle is fitted with an automatic 'up idle' system. Depending on how cold the ambient temperature is. The colder it is outside the higher the idle, until the engine reaches normal operating temp. The engine should then settle down to the correct idle speed. If however the cold start raises the speed to more than 1350, have a scan carried out. If the idle speed is always at a high rpm, do the same.A leakage of air into the intake manifold can also cause the latter problem. A leakage however will not be evident via a scan. Regards Johngee10

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Need to know how to rewire the evo3 maf to work in the vr4. Car works but is idling high and is not decreasing. I think it may be a prblem with the wiring??


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My 1998 Dodge Neon manual transmission DOHC idles high. WHY??


Without actually seeing the car, I would first look at the linkage and springs from the accelerator to the fuel intake. Could be as minor as dust build up or loose cable. Start with that, should that not fix the problem, try adjusting the idle set screw. Turning it clockwise will increase idle, counter clockwise will decrease. Try to have idle around 500-600rpm.

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Miss fires. jerks when de-accelerating. idle increases then decreases


when all else fails replace the ignition module on the distributor. As it fails it will cause high idle and other symptoms. Does the problem only happen when the engine is hot?

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1 Answer

Rpm is high upon starting the car and does not decrease in speed until I drive the car


sounds like ur timing is too high..u should be around 900 in park and about 600 700 in idle in drive..i just payed 35 to get mine done cuz i dont havethetools:-/

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