SES light is on, goes off and runs rough... - Ford Powerstroke Diesel Forum
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Old 09-15-2010, 08:13 AM
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SES light is on, goes off and runs rough...

working on a 2000 e-350 7.3, it now suffers from a loss of power with white smoke, dies going up hills less than a mile from the house. had a really poor connection at pos battery terminal but got that issue sorted out with new terminals and db starter, etc. moving on and trying to shed some light on my other issues...

about a year ago when it would drive, the SES light was on all the time after a service. pretty frequently, while driving, the SES light would go off and the truck would start to run rough and shake a bit. if you left your foot off of the accel pedal, the light would eventually come back on and the truck would run fine again...

anything obvious about that? seems like it should be the other way around...

don't have an AE scanner. going to go unplug the ICP and see what's up. the alternator seemed to not be putting out anything for a minute, and then jumped up to 13-14v. had a bit of AC voltage across also, bad diode in alternator? could that be causing this problem or just another issue

sorry for the rambling, thanks in advance!

trevor
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