Help, Engine Revs Up And Down

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04-11-2005, 10:34 PM

mesallem

Junior Member

Thread Starter

Join Date: 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, 02:40 AM

BlownSE

Senior Member

Join Date: Jan 2005

Location: FRISCO

Posts: 179

[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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Vac leak or Coolant temp sensor!