We have a 1995 YJ 4 cylinder. It cuts out at high (3800-4000) rpm. We've replace fuel filter, coil, rotor, wires, and plugs as well as the throttle position sensor. I've heard that it could be the crank sensor and fear we may be floating tired valve springs. Any ideas would be appreciated.
YJ 4 cylinder cutting out at high rpm
- Thread starter gcheris
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- 4 cylinder cutting out misfire
What we had finally learned? The flex plate was somehow the issue. It looked fine, no issues when magnafluxed etc. However, replaced it with a used one that 'looked' worse fixe the problem immediately. All we could surmise that it somehow was flexing to far at 3000 rpm and moving the timing windows out of sight of the timing sensor.
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Oops, sorry, I meant to say flex plate.
No, no codes. Like I we replaced everything we could think of. Finally we took it to a Toyota guru at a small shop Applegate, Ca, Zack, who loves a challenge no matter what vehicle. He we thru and temporarily replaced everything we had replaced just to check - same results. So he started following the spark and found that if he moved the position sensor it would create the same issue. He said he could not prove it but we replaced the flex plate it would solve he problem and it did.
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