Who has the random misfire problem?

[EclipseGST]

How do you do it?

[blageo23]

If its simple and you dont have to do much and its cheap. I am down. What does my car need for this to be done? just the code? Do I need datalogger or anything?
Mike

[1ViciousGSX]

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.I know what causes the code to set, I never heard of smoothing the cas signal.:cool:

[LightningGSX]

I know what causes the code to set, I never heard of smoothing the cas signal.:cool:
Probably because no one has ever thought of it.

Scratch that anyway, I figured out a much better way of taking care of the problem, and EGR/O2/Evap codes too.Details when I know if it works.

[blageo23]

How long you thinking? cuz that would be sweet. My car would be perfect if it didnt have the Random misfire and O2 codes. Let me/us know asap.