Glow plugs
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From: Wainwright Ab, Can
Glow plugs
I went out to start my truck this morning and it wouldn't fire. Hooked my scanner up and got codes p671, p672, p673,p674, p675, p676, p677, p678. I know they are the glow plugs. I just swapped the motor so i'm thinking wires might have got bumped or something. Seems strange that all of them would go at the same time. Makes me think a connection, fuse or relay. Truck ran great till it wouldn't start! Any thoughts would be great.
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Check the connectors that plug the glo plug harness into the gpcm.Youll have 4 wires per side, trace them down from the glo plug to the connector ends. Once you find them youll see what im talking about. Sure sounds like they didnt get hooked back up in The swap.
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From: Wainwright Ab, Can
Would they be the ones with the metal clips?
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No. Theyre the ones on the other end of the metal clips. On my 04 the left bank wires come up by the left valve cover. The right side are in about the same place. Theyre multi colored wires. I think brown, yellow, white, black?. Youll know them when you see them. Did you connEct the gpcm power lead back up?.i think its to coincidental that youre getting codes for all 8 after the swap.
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From: Wainwright Ab, Can
Well 3hrs later of checking and double checking and triple checking wires, connections, ect and still no fire. Will get a new gpcm on monday and hope for the best.
I'm about ready to pull my hair out.
I'm about ready to pull my hair out.
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From: Scio, OR
Have you checked your FICM, etc? The glow plugs will help a really cold truck start, and a somewhat cold truck start better, but unless it's way below freezing bad glow plugs are not going to keep a truck from starting.
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Check the ficm ground. Should be on a stud just behind the ficm. Dc makes a good point. If youre getting fuel itll puke grey smoke with no glo plugs when starting, but it still sounds like something isnt hooked up.