engine light on and very rough idle - Ford Powerstroke Diesel Forum
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Old 07-07-2012, 06:39 AM
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engine light on and very rough idle

hello all,

this morning on way home truck ran great for about 15 miles then all of a sudden it started running very rough , low on power, and engine light on. I also noticed battery gauge went low like no power. Had towed home and I've tested alternator and its fine. any ideas on where to look for a problem? its my daily driver. any and all help greatly needed!

thanks
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Old 07-07-2012, 06:44 AM
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have batteries tested individually. Any smoke? symptoms sound about like uvch. You're gonna have to figure out what that code is

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Old 07-07-2012, 06:47 AM
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havent tested batteries but i will do that. sorry to be ingnorant but what does uvch stand for? newbie here!!! thanks for your help!
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Old 07-07-2012, 06:48 AM
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Check all the connections at the valvecovers. Look for burned/melted connectors and pins. Also remove the oil cap and take a sniff. If it smells like burned electrical insulation, you probably have torched connection(s) at the under-valvecover harnesses (UVCHs). Cheers!
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Old 07-07-2012, 06:50 AM
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thanks will check that out and post what i find!
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Old 07-07-2012, 06:54 AM
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just took off oil cap and it sure does smell like something burnt! sounds like thats my problem! any idea how much a fix may run me?????
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Old 07-07-2012, 07:39 AM
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Not much should set you back a 100$ and that's for all 4 harnesses

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Old 07-07-2012, 07:50 AM
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great!!!!!!!! i can handle that!!! any idea what causes this harness to burn up?

thanks for everyones help!
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Old 07-08-2012, 06:08 PM
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Usually high resistance in the glowplug wiring connections. I always suggest that if you are replacing any of the connections to the valvecover gasket, replace the gasket too. Otherwise you will most likely have the problem again shortly. Cheers!
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