Another Burnt Pigtail Thread
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Tuned
Joined: Sep 2015
Posts: 393
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From: Vermont
Another Burnt Pigtail Thread
Lifted the hood this morning and saw smoke wisping up from the front PS injector connector. Shut it down and disconnected it, and the 2 prongs towards the windshield are melted away on the pigtail side and gasket side. I was planning on doing this replacement incrementally doing the passenger side first, new interior wiring, gasket and both pigtails. Then drivers side when I have more time. My question though is while the valve covers are off, is there anything else I should preemptively replace? Glow plugs were replaced with Motorcaft ones when I bought the truck about 7 years ago. Also, I was planning on ordering stock Motorcraft from Riff Raff, is that the best option?
Thanks.
Thanks.
Lead Driver
Joined: Apr 2016
Posts: 7,213
Likes: 1,342
From: Bahstun
Check spring height or go with new springs and correct the height
Injector orings maybe while in there
Can go with SD single connector if doing pigtails for UVCH as an option.
RiffRaff sells good stuff. Never had an issue with them.
Injector orings maybe while in there
Can go with SD single connector if doing pigtails for UVCH as an option.
RiffRaff sells good stuff. Never had an issue with them.
Mountain Pass
Joined: May 2014
Posts: 160
Likes: 54
Inspect all the other pigtails on your main engine harness. The ipr plug is a common failure point. Have you driven it very many miles in those 7 years? You may have some glow plugs that aren’t working. You may want to pull them out and make sure none of them are trying to swell on you at all. As mentioned, if your injectors have ‘high’ miles on them you might want to put new orings on them while you have the valve covers off. If you don’t pull the injectors you should check torque on injector hold-down bolts. Any long crank to start, white smoke when engine warm symptoms could be a couple more reasons to pull your injectors.
Check for soot on pedestal, turbo, back of block, firewall…
Check for soot on pedestal, turbo, back of block, firewall…
Thread Starter
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Tuned
Joined: Sep 2015
Posts: 393
Likes: 60
From: Vermont
Inspect all the other pigtails on your main engine harness. The ipr plug is a common failure point. Have you driven it very many miles in those 7 years? You may have some glow plugs that aren’t working. You may want to pull them out and make sure none of them are trying to swell on you at all. As mentioned, if your injectors have ‘high’ miles on them you might want to put new orings on them while you have the valve covers off. If you don’t pull the injectors you should check torque on injector hold-down bolts. Any long crank to start, white smoke when engine warm symptoms could be a couple more reasons to pull your injectors.
Check for soot on pedestal, turbo, back of block, firewall…
Check for soot on pedestal, turbo, back of block, firewall…
A question, assuming it is a glow plug at fault can I cut the two wires on the pigtail that are burnt in order to take the glow plugs out of the loom so i can plug the pigtail in and start the truck without more smolder? I have to run the truck for like 3-5 minutes to get it from my house into my shop,
It's above 32* today, so starting shouldnt be an issue.
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Tuned
Joined: Sep 2015
Posts: 393
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From: Vermont
And is it okay to drive in general like that? My parts dont arrive until tommorow afternoon and I am relegated to my RWD '72 Datsun 510 that I don't like driving when there is salt on the roads.
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Tuned
Joined: Sep 2015
Posts: 393
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From: Vermont
I didnt see any information on this, but when I swapped the glow plugs I initially blew out the 4 oil galley's with compressed air, cracked the seal on each, and as I replaced them I blew out again and inserted them quickly. I saw a guy on YT who removed them all, placed the valve cover on and cranked the motor over to move the oil, then put them all in. I thought my method was cleaner, am okay?
Lead Driver
Joined: May 2009
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From: Tobyhanma, PA
For GPs? That sounds like the method for swapping injectors.
GPs should just kinda wipe the area around it before pulling and stab the new one in quickly to prevent any debris entering cylinder.
A small amount of oil falling in isn't a big deal. Too much could hydrolock the cylinder of course though
GPs should just kinda wipe the area around it before pulling and stab the new one in quickly to prevent any debris entering cylinder.
A small amount of oil falling in isn't a big deal. Too much could hydrolock the cylinder of course though
Lead Driver
Joined: Mar 2006
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From: western SD
I didnt see any information on this, but when I swapped the glow plugs I initially blew out the 4 oil galley's with compressed air, cracked the seal on each, and as I replaced them I blew out again and inserted them quickly. I saw a guy on YT who removed them all, placed the valve cover on and cranked the motor over to move the oil, then put them all in. I thought my method was cleaner, am okay?
Thread Starter
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Tuned
Joined: Sep 2015
Posts: 393
Likes: 60
From: Vermont
When ever I have changed glow plugs I just remove the old one and install the new one, I never get enough oil in the cylinder to bother. The injector replacement is where you need to get the oil out of the cylinder to prevent hydro locking. When replacing the pigtails to the plugs/injectors I cut and splice one wire at a time to prevent mixing the wires up, as the wire colors never seem to match with the new pigtails and existing harness.
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