mulitple misfire ses light set an flashing but car runs fine?
07-01-2010, 07:39 AM
#1
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mulitple misfire ses light set an flashing but car runs fine? for some reason my ses light is flashing in my 99z28 and it comes back as a multiple misfire code but my car runs fine. anyone know what this could be?
07-01-2010, 10:06 AM
#2
I believe the PCM only detects MM by sensing quick changes in crank speed at idle. In other words it's looking for a smooth rotation of the crankshaft, not like when there's a miss or idle roughness caused by a hot cam. A cammed car often sets MM if idle is low. You can work around this by raising the idle. If no cam, find the misfire.
07-07-2010, 12:38 AM
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what do you mean read it with a scanner? ive hooked up a code reader to it and it comes up with the muti misfire code but the car runs fine at all times??
07-07-2010, 05:36 AM
#7
The code reader you have is just that, a code reader. A true scanner will let you see the actual real time engine data to help you diagnose a problem.
A scanner will show you the engines misfires as they are occurring, cutout one cylinder at a time, etc so you can pinpoint which cylinder is having the issue.
A scanner will show you the engines misfires as they are occurring, cutout one cylinder at a time, etc so you can pinpoint which cylinder is having the issue.
