If you are running the ls motor with a b16a ecu do not install the crank fluctuation sensor. The ecu will trip out and start throwing all the missfire codes, 71,72,73,74. I know from experience, The same year car and the same motor and ecu, the car barely idled with the crank fluctuation hooked up when I unplugged it and reset the ecu it purred and ran fine.
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