Question about 1988 Chevrolet Caprice

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1988 caprice idles fast at every start up then calms down after 4 or 5 minutes

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Get a certified mechanic to adjust ya carb.

Posted on Feb 28, 2010

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YOU NEED THAT THE CARBURATOR SHOKE BE RE ADJUST. IT HAS THE FUNCTION OF ELEVATE IDLE UNTIL MOTOR WARM AND THEN TURN IT TO THE REAL LEVEL. EXCESIVE IDDLE OR TIME MEAN CARBURATOR NEED BE SERVICED AND OR RE ADJUSTED

Posted on Sep 25, 2009

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1 Answer

Ive got a 96 caprice 4.3l that idles real high in park and calms down a little in gear but rpms are still to high...replace pcv valve and vacuum lines...next likliest cause?


Idle air control motor. Mounted to the side of the throttle body. Pull it, clean it and the hole it came out of. Brake clean and a tooth brush. If it still idles high, replace the motor.

Apr 16, 2016 | Cars & Trucks

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1988 Suburban with 5.7 TBI runs fine until warms up. Goes to fast idle and when it comes off fast idles won't start back until cools down.


Lets start at the beginning. Is the check engine light on ?
You have an idle air control valve which could be sticking open or shorted to ground. You should be able to unplug it to test. There also could be a gasket or hose that is opening up and causing a huge vac leak.

Aug 06, 2014 | 1988 Chevrolet K1500

1 Answer

I have a 1988 mighty max that I bought with a rod knock. I have tore the bottom apart and replaced the cranck shaft and bearings ( main and rod) now that it is back together I am having idle trouble. cold...


I found this on another website on about adjusting the carb, not sure if this is the cause without knowing more information but give it a shot. should only take you about 10 minutes. "set the lever on the second highest step of the fast idle cam. measure the primary valve to throttle bore clearance, manual trans .031 inch automatic trans .035 inch, if its off, adjust it with the fast idle adjusting screw if you turn the screw clockwise the fast idle rpm increases,if you turn the screw counterclockwise the fast idle rpm decreases." You also may want to recheck the timing to make sure its exact.

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I need to know the starting procedure for a 1988 honda accord carburator type enbgine


when cold you want to fully depress gas pedal twice and then with pedal released start car,this engages choke and fast idle

Oct 05, 2009 | 1988 Honda Accord 4 Door

2 Answers

My caprice runs to fast...


pretty sure that year is throttle body fuel injected if so check idle air control switch may be stuck or passage may need to be cleaned cylinder shape located on throttle body but first check all vacuum hoses for leaks or cracks

Mar 31, 2009 | 1985 Chevrolet Caprice

1 Answer

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1 Answer

1988 handa accord


I have an 87 Accord with fuel injection that always had a fast idle, and a surging problem when warming up. Both problems went away when I replaced the fast idle valve, which is bolted to the rear of the intake manifold just downstream of the throttle body.

Dec 18, 2008 | 1988 Honda Accord 4 Door

1 Answer

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Change your throttle position sensor.

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1 Answer

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I have a similar problem which seems to stop ,if after 20 mins of driving or warmed up engine if you stop for 10 mins the revs die to a more normal 1500 revs! it is a spanish car now living in theUK I think the problem is choke related.

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