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Discussion Starter · #1 ·
I have a 2000 zr2 that has a weird engine skip between 45-55 mph. It runs great at any other speed. if im driving on a road between 45-55 the rpm will keep fluttering up like the motor is missing. Ive gone through this thing doing a tune up, fuel pump, injectors and so on. Ive also started changing most of the vaccuum lines in the engine bay. Also ive noticed with the motor under load my heat will change from defrost to vent all by itself like its loosing vaccuum. Maybe its a vaccuum leak? If it was a vaccuum leak wouldnt i experience these symptoms throughout the rpm range? I do have a check engine light on by ive had this prob with no lights on at all.


Thanks
 
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