Help, Engine Revs Up And Down

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04-11-2005 | 11:34 PM

mesallem

Thread Starter

Junior Member

Joined: Apr 2005

Posts: 16

hello, i have successfully fixed the 1987 rx7, now when i drive and hit about 5000 rpms, the engine seems to rev back and forth by itself making the car jerk, what is my problem, also, i think i may have an exhaust leak, how do i check and fix it?

04-12-2005 | 03:40 AM

BlownSE

Senior Member

Joined: Jan 2005

Posts: 179

From: FRISCO

[quote name='mesallem' date='Apr 11 2005, 07:34 PM']hello, i have successfully fixed the 1987 rx7, now when i drive and hit about 5000 rpms, the engine seems to rev back and forth by itself making the car jerk, what is my problem, also, i think i may have an exhaust leak, how do i check and fix it?

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[/quote]

Vac leak or Coolant temp sensor!