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Thread: No rev past 4300.

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    Rice Patrol verified Feedback Score 0 Mean Green's Avatar
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    No rev past 4300.

    Plugs where gapped to 35, vacuum reads 17/18 at idle, new coolant temp sensor, new wires, new plugs, new FPR, still a fresh engine. If I hit the throttle 100%, it will start to pop and backfire. If I slowly get into it, 50% throttle, it will rev to redline.

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    Member verified Feedback Score 2 (100%) blindmist's Avatar
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    Sounds like you have a 2-step. :P

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    Quote Originally Posted by blindmist View Post
    Sounds like you have a 2-step. :P
    That's exactly what it sounds like...literally.

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    Still running that coil on plug setup ? I have a strong feeling its your ignition if your timing and fuel are spot on...
    Last edited by mb7050; 10-18-2010 at 07:36 AM.

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    Quote Originally Posted by mb7050 View Post
    Still running that coil on plug setup ? I have a strong feeling its your ignition if your timing and fuel are spot on...

    I took the COP system off. It's 100% stock now. I am going to go get some coils later today as I am thinking the same thing...

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    I am having the same problem.
    July 2014 COTM
    We follow the earth. The earth follows the stars. The stars know their way and though the body dies. The stars will remain, like the waves of the sea and restless slate.

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    I had the exact same issue when I bought my car. So glad thats gone. I replaced and upgraded SO many things along the way of figuring it out. Went maft, changed injectors, changed tuning devices, and ext. Basically it boils down to 3 things. Messed up fuel filter, messed up FPR, and either leaking turbos (or in hin sight pressurizing my crankcase).


    Coop

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    Well I guess I will replaced my fuel filter, check out my FPR and do a boost leak test.

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    Boost leak is NOT the same as pressurizing the crankcase or leaking turbos.


    Coop

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