P0678 and no cold start
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New User
Joined: Oct 2009
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From: Ocean Springs MS
P0678 and no cold start
Good day all. I have a 05 6.0 and the temp has dropped down below 50 the past couple of days and in the mornings the truck wont start.
My programer is throwing a p0678 code (#8 GP circuit). I turn the key to on until the glow plug indicator goes off and try to crank it. It will crank for about 6 seconds and then fire for a split second and die.
Would one bad glow plug cause the truck not to run in colder temps? Been waiting on my block heater cord to come in to help on colder nights but hasnt shown up yet. If the truck sits with the sun beating on the hood it will eventually start and run rough at high idle till it warms up and it runs fine.
Thanks!
My programer is throwing a p0678 code (#8 GP circuit). I turn the key to on until the glow plug indicator goes off and try to crank it. It will crank for about 6 seconds and then fire for a split second and die.
Would one bad glow plug cause the truck not to run in colder temps? Been waiting on my block heater cord to come in to help on colder nights but hasnt shown up yet. If the truck sits with the sun beating on the hood it will eventually start and run rough at high idle till it warms up and it runs fine.
Thanks!
Hotshot
Joined: Apr 2010
Posts: 19,060
Likes: 238
From: Saratoga Springs,UT
Might try and cycle the key a few times before starting for now
It could be GPCM or just the GP
try this
GLOW PLUG TROUBLE SHOOT THREAD
https://www.ford-trucks.com/forums/1...cel-light.html
But I really think it could be your FICM check the FICM volts
https://www.ford-trucks.com/forums/8...procedure.html
It could be GPCM or just the GP
try this
GLOW PLUG TROUBLE SHOOT THREAD
https://www.ford-trucks.com/forums/1...cel-light.html
But I really think it could be your FICM check the FICM volts
https://www.ford-trucks.com/forums/8...procedure.html
Thread Starter
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New User
Joined: Oct 2009
Posts: 20
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From: Ocean Springs MS
Well i went back outside earlier and the truck had 9 more codes. Injectors 1-8 and a p0611 as well as the p0678.
Pulled the FICM and made the solder repairs. All back together and it fired up like a dream!!! Still got the P0678 code so I will see how it fires tomorrow morning when its cold.
Pulled the FICM and made the solder repairs. All back together and it fired up like a dream!!! Still got the P0678 code so I will see how it fires tomorrow morning when its cold.
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