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Old 06-03-2007, 12:30 AM   #1
filteritout
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Default Engine Jumps at high RPM

I just purchased a 2002 L200 with 111K miles at an auction. When I am driving the car and it gets up to 50-65 MPH the front end starts to shake. I figured it was a motor mount. Further inspection showed that all was ok them, but when I rev the engine to a higher idle it cuts in and out and causes the engine to jump, thus the same reason it shakes while driving soen the road at higher RPMs. I assume that it is some sensor or something. Any ideas?

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Old 06-03-2007, 12:28 PM   #2
Cincy Saturn
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Wrench Re: Engine Jumps at high RPM

Quote:
Originally Posted by filteritout View Post
I just purchased a 2002 L200 with 111K miles at an auction. When I am driving the car and it gets up to 50-65 MPH the front end starts to shake. I figured it was a motor mount. Further inspection showed that all was ok them, but when I rev the engine to a higher idle it cuts in and out and causes the engine to jump, thus the same reason it shakes while driving soen the road at higher RPMs. I assume that it is some sensor or something. Any ideas?

Thanks
Could be as simple as the fuel filter being original and not passing enough fuel for the high RPM's. Cheap fix.

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Old 06-03-2007, 12:35 PM   #3
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Default Re: Engine Jumps at high RPM

It could be misfiring. Check to see if the ignition module recall has been done. A call to a local Saturn retailer could tell you if it has been done or not.

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Old 06-03-2007, 03:40 PM   #4
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Default Re: Engine Jumps at high RPM

The earlier L-series cars had known problems with vibration from the front end. 2002 was about the last year of the problem being very common. Check the tire balance. Get a hist of the work done on the car from Saturn to see if any vibration work has ever been done to it.

As for the engine revving cutting out. If you are doing this with the car not moving then you are hitting the rev limiter and the engine is supposed to cut out. Happens at approx 4,000 RPM.

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