Yesterday I had left my running lights on for the night by accident and had to jump start the jeep in the morning. It started up fine, but would idle very low. 430~ per scangauge II. I figured that since the battery was low maybe it was just causing problems with the ignition. I drove it around long enough to recharge the battery, but still has the low idle problem. When I am driving, my volt meter will read about 13.5V (also verified by scangauge). It cranks and starts every time, but will still always settle into this really low idle. Just as a test, I let it sit at idle for about 3 or 4 minutes in D, with foot on brake to see if it will die, it does not. If the AC is turned on, it will idle a little better, but still not well.
The alternator was my first suspect, I am taking it over to AutoZone tomorrow to have them test the Alt output. Is there anything else I can check in the meantime?
I am going to reset the engine computer to see if that does anything... My ecu has a few quirks.
All help is appreciated! Thanks in advance.
-Cher"Sounds Cammed"Bear
EDIT: 2000, 4.0, AW4. Battery is 5 yrs old. Alternator is stock. 135k miles.
The alternator was my first suspect, I am taking it over to AutoZone tomorrow to have them test the Alt output. Is there anything else I can check in the meantime?
I am going to reset the engine computer to see if that does anything... My ecu has a few quirks.
All help is appreciated! Thanks in advance.
-Cher"Sounds Cammed"Bear
EDIT: 2000, 4.0, AW4. Battery is 5 yrs old. Alternator is stock. 135k miles.