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Message: <blockquote data-quote="chriseunos" data-source="post: 10625" data-attributes="member: 3656"><p>Hi, im currently driving an E30 with a M20B25 engine. I have some questions to ask, feel free to give some input.1) During High revs, be it at the rev limit or almost reaching the rev limit, my car suddenly hesitates and doesnt want to rev. My question for other E30 driver is, during rev cut, does the engine still revs or the whole car "died off". During the hesitation, i tried pressing the accelerator, sometimes will have a loud misfire from the exhaust and my friends said that they saw ball of flames :stupid: 2) Im using a M40 meter cluster, which is not suitable for the M20 engine. The temp gauge and the tachometer flickers irratically. Does this meter have any effects on the  engine? I've check the SI board in the meter and it works fine with no corrosion to the SI battery and the meter board. Will this cause the hesitation during high revs?3) I did adjusted the TPS and the hesitation still occurs. Sometimes, not even high rpm, the car just hesitates. 4) Another suspect is the 02 sensor. My car doesnt have the CAT and the previous owner for some reason extend the 02 wires and now my o2 sensor is at the middle of the car. It is plugged after the exhaust bullets.Sorry for the long post, just wanna give as much information as possibleChris</p></blockquote><p></p>