Question about 1992 Honda Civic

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Idle revs up and down by itself ..1992 honda civic

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This problem is caused by a sludged up intake idle speed control valve to clean it follow these instructions.
, Get a can of intake cleaner from any local parts store, not carb spray, intake cleaner, it is made by a company called CRC, remove the air intake hose to the engine, hold the idle high so the engine won't stall, then spray the can of cleaner into the intake while keeping the engine running, use at least 1/2 the can, shut down the engine and disconnect the battery for 5 minutes, then restart and complete a number of mixed driving cycles, town, freeway, stop and go etc., after a few days the problem will go away as the system will relearn to the clean intake.

Posted on Nov 19, 2009

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You need to clean the FITV valve, the IACV valve, AND the throttle body! NOT how the man above was describing THAT doesnt work! I've tried!!! No dis-respect or anything, Not trying to put him down just saying!!!

Posted on Dec 21, 2009

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Car runs fine otherwise, yet it revs itself up to over 22k rpm and smokes like a beast. This will go on for some time, then it will rev back down, and stop smoking. Then it will rev back up and smoke.


With due apologize, the very first thing which I would like to amend is that it is not 22 k but it is 2.2 k (2200 rpm).
To solve the problem please check the following:
- Vacuum leaks. (PCV valve, A/C idle up vacuum switch and actuator, vacuum hoses routing, gasket intake manifold, distributor vacuum dash pot.
- Valve clearance.
- Ignition system.
- Carburetor vents and lines for clogged.
- Idle speed solenoid switch and its connection. (Remove the solenoid, put a finger on its hole on the carburetor, start the engine keeping the finger on the hole. If it maintains the stable rpm replace the solenoid or check the voltage on the switch).
- Adjust the air fuel mixture.

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1 Answer

1992 honda civic idle goes up and down


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1 Answer

Idle lopping on 1992 honda Accord


its called a honda rev. its very easy to fix too. ok look at the intake manifold and there is a circular looking pipe coming up. unbolt one of the two screws all the way and the other one just enought to turn the top. once you get the top turned stick your finger in there its almost like a vaccuum and turn clock wise untill it stops and your done. it is only two phillips head screws and its sitting right on the intake manifold in the front of it

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1 Answer

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If the check engine light is on, take the car to an autoparts store and have them use a scan tool to retrieve any fault codes stored in the computer. Most parts stores will perform the scan at no charge. Getting the codes will go a long way toward identifying what the problem is. I would look at a faulty idle air control valve, but getting the codes should end the speculation. Hope this helped and best wishes.

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