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What is a "rev limiter"? how do i reprogram iac to

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The mas rev is programed in the ecm and is not adjustable without the proper program, the ecm also control the idle speed. help???

Posted on May 28, 2011


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Buy a flashed/reprogrammed ecu with a higher limit or get your one reprogrammed

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It's in the program. You can buy a programmer from many sources and reprogram it yourself. What these things do is raise the rpm limit to increase horsepower and torque. The reason for a limiter in the first place is to guard against overrevving the engine and destroying it.

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Remove rev limiter

To remove the rev limiter, you must have your engine control computer reprogrammed, so that means that you will have to take it to the dealer and have their techs reprogram it to your specs.

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Car stuttering

The rev limiter kicks in at about 6800 RPM to prevent "coast over" to unsafe revs, so I suggest you have a custom programmed PCM that eliminated the rev limiter feature or moves up the RPM limit.

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Lexus sc400 stalls at stop sins, etc.

what is the rev count showing at idle? if its lower than service manual specs then adjust and observe. otherwise could be what the other guys said: throttle sensor,IAC valve,fuel filter, plugs or igniter.

Jul 13, 2012 | Cars & Trucks

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I replaced my iacv on my '97 chevy malibu as recommended and after driving 34 of the recommended 40 miles the check engine light came back on....what could be the cause? what can I do to correct the...

have to reprogram iac to specs to do this hold rpm just below rev limiter for 2 minutes then do again should reprogram but turn the light out first by disconnecting negative battery cable

May 28, 2011 | 1997 Chevrolet Malibu

1 Answer

Car is loosing power rpm rev to 5000/6000 car goes slowly at first then picks up speed also over heats

possible causes, but not limited to....
vacuum leaks
defective computer
defective IAC
defective MAF

Sep 17, 2010 | 2004 Nissan Sentra

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I need to remove my rev limiter on my eagle talon and i just need to know where on the car it is. I can do the rest of the work myself once i know where it is. by the way my Talon is a 1992 2.0...

The rev limiter is built into the program of the Engine control module. You will have to replace the ECM with one that doesn't have a rev limiter or reprogram the ecm to eliminate the rev limiter.

Aug 07, 2010 | Eagle Talon Cars & Trucks

1 Answer

The engine runs really well, until you bring the car to a stop. Then it dies. Sometimes it dies when moving. Just push the clutch pedal in and when the revs go down, it dies.

The two most likely possibilities are a vacuum leak, or a faulty Idle Air Control (IAC or IDAC) valve.

Inspect the vacuum hoses for cracks or tears. With the engine running, listen for any tell-tale hissing sounds. Make sure there are no leaks in the intake manifold area.

Check the IAC wiring and connector. Use a voltmeter to test its harness. Refer to a manual for the specs of the voltages on the connectors. Also test the IAC itself with an ohmmeter. Again, refer to the manual for the correct resistances across the leads. Another diagnostic is to remove the IAC entirely, leaving the intake open. If the engine idles ok with the IAC removed, this is a sign that the IAC is not opening at idle as it should.

Mar 17, 2010 | 1993 Honda Accord

1 Answer

Rev limiter

You'd probably have to get a reprogrammed or chipped engine computer. Removing the rev limiter though is a sure fire way to destroy your engine. Even Ferraris and Porches have rev limiters.

Jun 01, 2009 | 1992 Saturn SL2

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