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The car idles very high for about 8 seconds then gradually idles down again

to normal, then idles up and down, you have to have one of your feet on the brake an the other on the gas pedal, it also shoots out black smoke out the exhaust pipe.

very scary to drive, but once on the freeway it drive good, but if you let go of the gas pedal slightly, it will jerk suddenly, get a new one or get one from an auto salvage

to make sure that it is your problem, then go buy a new one, good -luck, I am going to try several from the salvage yard till I find a good one that actually helped me with this problem, then I will go get a new map sensor also."speedon55@hotmail.com".....

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Q: What are the symptoms of a bad Manifold Absolute Pressure Sensor?
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