Question about 1994 Chevrolet Caprice Classic

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Fasat idle This is a 1991 Chev Caprice Classic 5.0. The engine idles way to fast and there seems to be no way to idle it down?

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Change your throttle position sensor.

Posted on Nov 16, 2008

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1 Answer

Why does a 1991 Chevrolet caprice stall while idling ?


could be cause by idle air control valve on the throttle body, usually u can remove and clean put it back , make sure unhook battery before removing

Mar 12, 2015 | 1991 Chevrolet Caprice

1 Answer

How do you turn up the idle in a 1991 Chev Caprice Classic?


Technically, you don't.
The computer controls idle speed via an idle air control valve that is screwed into the side of the throttle body.
If you try to adjust base idle, the computer will try to overcome it.

Mar 12, 2015 | Cars & Trucks

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How do I adjust throttle cable on 1989 chev c2500 to raise idle speed throttlebody injection


Can't adj..clean your IAC. Idle Air Control valve, or possibly replace it. The Computer adj's you idle by this valve moving in and out, it gets carboned up and does'nt move like it should.

Feb 13, 2012 | Chevrolet C2500 Cars & Trucks

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91 chev s10 V6 2.8L Very fast idle on startup , slows down a little after long warm up but not much. is their an adjustment that can be made


The solution is most likely the IAC(idle air control valve) or possibly the throttle position sensor. Both are electrical switches mounted on TBI(throttle body injection) unit. If you have a Autozone close by, they will test these for you for free.

Nov 01, 2010 | 1991 Chevrolet S-10

1 Answer

My 84 caprice classic it has a very shakie idle


When you start your car, you step on the gas and turn the key, you have set the high idle feature on the carb as part of the warmup sequence. When you step on the gas again, you kick high idle off ...if premature, the engine is cold and it runs ruff, and wikll likely stall under some circumstances until you have reached operating temp. The reason for the ruffness ...is gasoline becomes 'gas' better when the engine is at operating temp than when the engine is cold.

Your battery is getting tired. When you step on the gas and the lights get brighter, it is because you are running the alternator at a higher speed and you are making more electricity which the lights are more than happy to gobble up.

Keep in mind your car is notonly a Caprice Classic ... it is a classic, 26 year old vehicle. It needs a little more TLC than a newer model.

Feb 24, 2010 | 1984 Chevrolet Caprice

2 Answers

My 1991 Celica GTS has a fast idle even when the engine is warm. I have already turned the idle adjust screw all the way down.


The idle on these is controlled electronically by an IAC solenoid (idle air control). Adjusting the screw will not do anything to adjust your idle down. Chances are you could have a vacuum leak, or a faulty IAC solenoid. I would start by checking for vacuum leaks.

Oct 17, 2009 | 1991 Toyota Celica

2 Answers

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


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

Jul 03, 2009 | 1988 Chevrolet Caprice

1 Answer

1991 chev caprice. car starts ok, but surges @ idle and cuts out when throttled.


Remove the large hose at the throttle body that come from the air cleaner clean the black carbon off of the large butterfly and housing with carb cleaner. Also have you checked plugs and wires

Jun 04, 2009 | 1991 Chevrolet Caprice

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

What is going on idle fine an then


Bad distributor and/OR coil, I can guess, or the computer.

Mar 11, 2009 | 1995 Chevrolet Caprice Classic

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