hard start,surging,rough idle,loss of power - Ford Powerstroke Diesel Forum
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Old 07-16-2006, 11:00 AM
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hard start,surging,rough idle,loss of power

Hi. I'm a newbie looking for answers.

I have a 2000 F250 7.3 Powerstroke with 105,000 miles. All of sudden it started having problems with surging on start up, rough idle and loss of power, which appears to happen after itís driving for a short distance. When this problem occurs, the MIL(service engine soon) will light up. I checked for trouble codes, but none were found. Also after it sets overnight, it seems to starts and run excellent for a short period, then the light comes on and engine starts running very poorly. Any suggestion will be extremely appreciated. Thanks
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Old 07-16-2006, 04:09 PM
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if the MIL light is on then there has to be a code of some sort, although not all scanners will read all codes....

My guess is that you have one or both under vavle cover harnesses starting to disconnect themselves. You will need to pull both valve covers and inspect. see if the locking tabs on the harnesses on the inside of the vavle covers are not fully engaged into the valve cover connector. If my hunch is right, you can either buy new harnesses, or the better fix is to keep the existing harness and put a clip on them available from ford that keeps the sagging connector from being able to sag and disconnect itself.....
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Old 07-16-2006, 07:43 PM
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Thanks for the info. I'll inspect the connectors and harnesses to see if it solves my problem.
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Old 04-10-2007, 10:08 AM
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It could be your Cam positioning Sensor starting to go bad. Mine would be hard to start and die and after it sat a while it would be OK. The Check Engine light never came on though. I picked one up on Ebay for a good price. Good Luck.
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