Check engine light doesn't come on ? - MustangForums.com



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Old 10-10-2013, 04:02 PM   #1
Maverick710
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Default Check engine light doesn't come on ?

hey guys my mustangs service engine doesn't come on and i know it has to come on because my cars having misfire issues. When i turn the cluster on without starting the car the light is on so the bulb is good so does anybody know if there's a fuse or relay that controls it?
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Old 10-10-2013, 05:16 PM   #2
Derf00
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Rather than rely on the light, hook up a handheld OBDII scanner that has a datalogger or live view. It will be obvious which cylinder is having the misfire then or what is causing it.
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Old 10-15-2013, 08:08 AM   #3
petrock
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Quote:
Originally Posted by Derf00 View Post
Rather than rely on the light, hook up a handheld OBDII scanner that has a datalogger or live view. It will be obvious which cylinder is having the misfire then or what is causing it.
+1. Not all misfires will cause the check engine light to com on.
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