do a compresion test, put up your numbers. that will tell you if you have a serrious problem. if you have good numbers, then check all your vacume lines for leaks, usualy the boot from the maf to the throttle body develops cracks, even small ones that you can barley see cause these symptoms. also could be any other vacume line. check your air filter, fuel filter, and clean your maf and idle control valve. if any of these arn't the problem then let us know.
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264* roatation and 388 lift