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Originally Posted by 1ViciousGSX
WTF?  |
The ECU times the crank angle pulsewidths for RM checking.If the times change drastically, from pulse to pulse, the misfire code gets set.The injection and ignition get triggered on the falling edge of the pulse(when it goes from on to off).I'm not sure what the actual threshold is, but for example, lets say one pulse is 50 mS, and the next is 40 mS.Since normal accel/deccel can't change that quickly, the ECU interprets that as misfire.Now if you were to smooth out the pulses, like not let them change more than 2-3 mS per pulse/per 4 pulses, by extending the beginning of the pulse so the falling edge stays where its supposed to be, misfire code would be gone and nothing else would be effected.