P0678? What do you think
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Postmaster
Joined: Jul 2005
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From: Abilene, Texas
P0678? What do you think
Ok just Finnished head job. Truck runs great just long crank to start (6 sec). Put the ae on it and came up with this code for cylinder 8 glow plug circuit. Do you think it's the harness or controler. it is an old controller (not the one that was on the truck when started head job). Or what eles could it be. They are brand new glow plugs. I put them in on the head job.
Post Fiend
Joined: Jul 2005
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Use some circuit cleaner (Radio Shack, electronics store) on the contacts before the dielectric grease (eg lithium grease).
I worked wonders with this method.
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Postmaster
Joined: Jul 2005
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From: Abilene, Texas
Yep you were right on #8 plug failed test replaced it and now runs great. I even tell pepole all the time that new isn't always good. Guess should have taken my own advise thanks again
Post Fiend
Joined: Oct 2009
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From: N. Fort Worth, tx
glad to help
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Elder User
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From: S CAL
A dielectric is actually an insulator and not a conductor.
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Post Fiend
Joined: Jul 2005
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The dielectric grease help the contacts move / slide, and in doing so, removes and inhibits corrosion for a better contact.
UNDER NO CIRCUMSTANCES SHOULD CONDUCTIVE GREASE (e.g. grease with graphite) BE USED.
You are looking at shorting out the entire harness!!!!!
Elder User
Joined: Sep 2007
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From: S CAL
Oh I totally agree. The dielectric grease does help keep moisture out and it helps prevent arching in high voltages like spark plugs and wires.
Fleet Owner
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[quote=3000 FPS;8295516]Oh I totally agree. The dielectric grease does help keep moisture out and it helps prevent arching in high voltages like spark plugs and wires.[/quote
Thanks for the clarifications 3000 FPS - it is always good to make sure the correct information is provided!
Thanks for the clarifications 3000 FPS - it is always good to make sure the correct information is provided!
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