runs rough with CEL - Ford Powerstroke Diesel Forum
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Old 08-09-2012, 12:10 PM
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runs rough with CEL

hey guys i hope i can get some help here. the problem started this morning on my way to work. i was driving down the freeway and the CEL came on and it was running like a terd, no power and it was missing.

i let off the throttle and within 2 seconds the light went away and it ran fine. i let it idle for a few minutes at lunch and the light came on it started to idle rough and it stalled. turned the key off and it started back up like nothing happened.

i did a little bit of reading and it sounds like a bad IPR or UVCH. also it rained alot last night and this morning. so im wondering if that has something to do with it because it ran fine on my way home last night before the rain. please let me know how to check these or if you have any other ideas of what it might be.
thanks
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Old 08-09-2012, 12:49 PM
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Could be a UVCH or external VC connector. You might want to disconnect and remove the IDM to see if it's gotten water in it. Also inspect the IPR wiring (fuel leaks cause problems with the insulation) and check that the IPR solenoid coil nut is snug. Cheers!
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Old 08-10-2012, 05:18 AM
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I checked all the external VC connectors one of them had a broken clip but when i unplugged it while running it wasnt as bad as the problem i was experiencing. ICP plug and wiring looked good. Any special instructions for getting the idm out to check it? I'll have to check the IPR wiring today. If the IPR is bad is there any way to check it
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Old 08-10-2012, 10:03 AM
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So i went to go to auto zone at lunch to pull the codes and nothing came up. The truck was doing it the entire time the way there. Even tried to pull them while the truck was running
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Old 08-10-2012, 12:57 PM
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Well from what i can tell its the entire drivers side bank not firing. My egt's were under 200. Gonna pull the valve cover and see what the harness looks like
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Old 08-10-2012, 06:22 PM
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If the idm detects a issue it can shut down one bank to protect it self.

Autosone scanner will not read your truck. You'll need a snap-on, AE, or a aeroforce scangauge to read codes
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Old 08-10-2012, 06:52 PM
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The uvch looks fine and the ipr didnt have any oil on it so im assuming thats fine. Pulled the chip out and its not constant but its still happening. So the IDM will shut a bank down if it detects a problem with itself or some where else?
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Old 08-11-2012, 01:43 PM
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Well i swapped IDM's with a buddys truck and its still doing it. I am lost here
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Old 08-11-2012, 06:06 PM
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The idm will shut a bank down if it detects a issue with wiring or an injector solenoid.
On the bank that's shutting down unplug one of the plug to the valve cover gasket and start the truck and see if it runs better if not plug it back in and unplug the other and start it.

For example if it runs better with the back plug unplugged the the problem is with the wiring or injector solenoids on one of the back two injectors
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Old 08-21-2012, 07:08 AM
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Well i put a cam sensor in and it hasnt done it yet so im hopin thats the problem
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