1994.5 - 1997 7.3L Power Stroke Diesel  

valve cover harness burned up

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Old 03-22-2017, 05:52 PM
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valve cover harness burned up

What would cause this all of a sudden, I was parking the truck and just before I was going to turn it off it ran rough with no power, it finally stalled out. I found three of the four connectors were melted including the vc gskt connector, so the engine was down to two cylinders running. I have the new parts, should I be aware of something shorting these out too? The truck is a '97 PSD w/330k on it never had the vc off, all is original. Thanks
 
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Old 03-22-2017, 06:30 PM
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Normal with mileage, a bad glow plug can draw more amps causing the wire to melt, replace the glow plugs and UVC
 
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Old 03-22-2017, 08:07 PM
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thought that might be the culprit, but it was running fine prior, I could understand this happening while energizing the gp's and cranking on it, but not after running normally.
 
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Old 03-23-2017, 06:35 AM
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Originally Posted by jimzpsd
thought that might be the culprit, but it was running fine prior, I could understand this happening while energizing the gp's and cranking on it, but not after running normally.


glow plugs run upto 2 minutes
 
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Old 03-23-2017, 07:31 AM
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And it could have been happening gradually for months, only reaching a threshold yesterday.

Would be worth checking GP resistance right at each GP connector, while you have the covers off. Or for that matter, if age of the GPs is unknown, leverage the work of removing the covers and replace the GPs now. Motorcraft/Beru ONLY.
 
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Old 03-23-2017, 07:53 AM
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Hello madpogue, you've been a big mentor to me over at TDS forums, but recently I cannot log in, (it keeps eating my password). My '97 is sold, a guy is making monthly payments and in the mean time I fire the old girl up and buzz it around the block to keep it active, so I hate to throw new gp's in it at my expense (yep, money is tight with truck payments lol). Any idea what ohms I'm looking for on the gp's? Thanks
 
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Old 03-23-2017, 08:16 AM
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GPs are about 1 OHM each, remove connector on VC and OHM outer pin to ground


If money is really tight, you could disconnect the bad ones and it will just run rough during warm up. it should run on just 4 cylinders until warmed up enough to fire the other ones. once spring comes it should start up easier.
 
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Old 03-23-2017, 09:34 AM
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I might ask the buyer if he wants to purchase the gp's and I'll install them, this way he is meeting me half way since I purchased two vc sets and connectors and doing the labor.
 
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Old 03-23-2017, 11:59 AM
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Is this a truck you're attempting to sell?
 
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Old 03-23-2017, 03:26 PM
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Originally Posted by madpogue
Is this a truck you're attempting to sell?
Yes, I've owned it for 17 years, local guy is making payments, but now its at the point it won't run so he cannot drive it, but he still owes $6500.00
 
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Old 03-23-2017, 04:33 PM
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So the GPs haven't been replaced in 17 years! Buy a lottery ticket!

Yeah, he'd be wise to spring for the GPs now, so he's not taking off the VCs again to do them in the near future. GPs that old MIGHT be in part to blame for the connectors failing.
 
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Old 03-23-2017, 05:02 PM
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Yep, its becoming a nightmare, I wanted it gone the second week in January and now its nickel and dimeing ME
 
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Old 03-27-2017, 07:25 AM
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Originally Posted by madpogue
And it could have been happening gradually for months, only reaching a threshold yesterday.

Would be worth checking GP resistance right at each GP connector, while you have the covers off. Or for that matter, if age of the GPs is unknown, leverage the work of removing the covers and replace the GPs now. Motorcraft/Beru ONLY.
Will these do? .....They don't say BERU though.
 
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Old 03-27-2017, 07:47 AM
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These what?
 
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Old 03-27-2017, 07:01 PM
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