Join Date: May 2008
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Intermittent "Service Engine Soon" Light
I have a stock 2000 F-350 with a 7.3 and 133,000 or so miles. I have owned it for 4 months and love the truck.
2 Days ago my "Service Engine Soon" light came on for a few minutes (maybe 5) and went out.
Yesterday when I started it in the morning it came on and stayed on and it began running rough and under-powerd.
On some advice I changed the fuel filter (it had only 3000 miles on it) and afterwards the light went out and it ran fine for a drive of about 50 miles.
When I started this morning it came on again. The light also went on an off a few times including a 15 minute stretch where it stayed off and it ran fine.
Right now it has stayed on for about 10 miles and is running poorly.