Question about 2002 Chevrolet Impala

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CAR SURGES WHEN YOU ACCELERATE IN OVER DRIVE.

THE CAR WHEN IT IS IN OVER DRIVE WILL PULSE OR SURGE LIKE THE REV LIMITER IS ENGAGED. THE RPM'S ARE IN THE 1500 TO 2500 RANGE. CAN START AS LOW AS 35 MPH. NO CHECK ENGINE LIGHT ON, THE ONLY FAULT IN THE CAR IS THE GAS GAUGE DOESN'T WORK PROPPERLY.

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  • Chevrolet Master
  • 373 Answers

It may be the MAF sensor. In needs to be cleaned or replaced. Located on the throttle body, under the engine cover. Might need special anti-tamper Torx sockets to remove. 2 bolts. One wire connector.

I had to replace mine on 2002 3800 V6. Bucked and shook on moderate to hard acceleration at about 3500-4000 rpms.

Posted on Jun 06, 2010

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Posted on Jan 02, 2017

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My grang cherokee2002 us spec, while driving trnz changes fine but when cick down or full excelrate and RPM reaches 4.5 or 5 engine is loosing power and getting noisy and RPM not going more, while gear on...


You are hitting the rev limiter top range, which cuts off your ignition.

I have a 2001 Grand Cherokee and the problem drives me crazy, but it is the way the car is designed- as soon as you hit the rev limit, it shuts down ignition and your jeep will "buck" - a real pain when you are trying to accelerate into traffic!

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Rev limiter is at 6000rpm not 8500rpm


Hi Peter,

With such high revving engines (me being a Honda fanatic) you need to keep an eye on oil levels. Check the level, top up as necessary. Without the correct amount of oil in, the oil pressure cannot stimulate the switch over cam, which takes it to 8500rpm.

Also, please don't rev you car without load (ie. standing still), this causes valve lash and is detrimental to the engine. Again, please do not rev your car hard without letting the oil get up to temperature or it won't last long :)

Once you check your oil, reset the ECU by pulling the battery lead off for around 20 minutes.

Good luck and have a blast. Could you vote for me if this helps you. Thanks.

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Sounds like a possible vaccume hose leak?

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