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1989 1500 chevy high rpm in park - Cars & Trucks

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SOURCE: rpm running high when park

well. your idle is just high. you can get a screw driver and find the idle screw on the throttle body. . and jsut adjust there , , that is if there are no problems.

now it also maybe a leaky intake. . . . but i think its jsut more of a small adjsutment. . 8)

Posted on Oct 22, 2008

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After getting my 95 GMC Sierra 1500 5.7L V-8 back from a failed emissions test I let their mechanic fix it( or pass smog) However, now when the truck is in park the rpm's are at 1200 about 300...


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Fuel probelms


Try hitting the brake off and on to see if the rpm changes when you do that with the car in park. If it does, you may have a ruptured brake booster. A fluctuating rpm while your car is in park with the brake on indicates a vacuum loss. Other things may cause a vacuum leak including the air conditioner controls inside the vehicle. Other things that cause this may be cruise control or your Air Conditioners high idle solenoid.

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Rpm running high when park


well. your idle is just high. you can get a screw driver and find the idle screw on the throttle body. . and jsut adjust there , , that is if there are no problems.

now it also maybe a leaky intake. . . . but i think its jsut more of a small adjsutment. . 8)

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