Question about 2001 Chevrolet Cavalier

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Whaa causes a 2001 cavalier engine to rev up and down when idling

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A vacuum leak could cause your concern. Look for broken / torn vacuum lines and hoses. Check the rubber bellow to the throttle body for tears or holes.

Posted on Aug 07, 2010

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Posted on Jan 02, 2017

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My 2001 monte carlo starts but revs up and bogs down while still scared to drive to auto store


A few different thing's could cause that , IAC - idle air control valve , vacuum leak , engine electronics , (sensor's) Would need to do testing to say for sure ! Know how to do basic engine testing ? Your best bet would be to take it to a qualified repair shop that has the diagnostic tools to find an fix this problem ! Wouldn't trust part's store's , they just want to sell you parts !

Sep 10, 2016 | 2001 Chevrolet Monte Carlo

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I have a 2001 Toyota Corolla. The revs fluctuate whilst idling.


could be a bad TPS or stuck, bad, dirty idle air control solenoid (IAC). check fuel pressure and check for vacuum leaks after the air flow sensor. more info is needed because what you describe could be many different things or a combo of different things

Mar 26, 2014 | Toyota Cars & Trucks

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My fiat idles but wont rev


That maybe what the rev limiter is set for.That way you can not over rev causing engine damage.

Sep 11, 2012 | 2001 Fiat Punto

1 Answer

When i turn the A.C. on my RPM flucuates and asks like it bogs my engine down.


This is common. The A/C is drawing power from the engine. The ECM should respond by adjusting idle flow. If A/C causes engine to stall or if "check engine" light is on, get a tune up

Aug 22, 2010 | 2001 Chevrolet Cavalier

1 Answer

Revs up and down at low revs


you need to clean or replace your idle air control valve(IAC). The IAC allows your engine to idle smoothly by opening and closing a valve that allows air flow to the engine that is monitored by the computer. The IAC get dirty causing it to stick and move slower than it should which causes the up and down idle

Oct 29, 2009 | 1998 Ford Escort

1 Answer

Idle irratic


Here are some of the causes of surges, stalls at stops, slow idle speed, erratic idle speed, rough idle and engine hesitation (and other problems), it is in most cases the idle speed control air-bypass valve and or throttle valve and upper intake, these area's get full of gunk and combustion residue over the miles and cause idle issues (stalls, low idle) like yours, 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

Apr 11, 2009 | 2001 Chrysler PT Cruiser

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1995 cavalier z24 running rough


check all your plugs and wires

Jan 29, 2009 | 1995 Chevrolet Cavalier

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