Cranking No Start-- Updated/ Solved
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Senior User
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From: Lake of the Ozarks
Thanks Mark, can you tell me more about testing the glow plugs? I don't have an inductive ammeter. I was hoping to get this thing running again before Thursday. I'm having surgery on my wrist that'll put me out of the game for a month.
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Check resistance on them. Each plug should read between 0.5 to 2 ohms resistance. You can disconnect the harness at the GPCM and check resistance at each pin on that connector (set your meter to ohms). If plugs are all good, then your GPCM could be bad (since you have several codes and a repeat code on the #6 that you already replaced). A bad GPCM CAN cause a no-start.
http://dan.prxy.org/Truck/6L_bible_h.../Page_068.html
See Mike's post (#5) here:
https://www.ford-trucks.com/forums/1...ult-p0675.html
An oldie, but a goodie.
http://dan.prxy.org/Truck/6L_bible_h.../Page_068.html
See Mike's post (#5) here:
https://www.ford-trucks.com/forums/1...ult-p0675.html
An oldie, but a goodie.
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Senior User
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From: Lake of the Ozarks
I'm really confused here Mark. I'm not getting a reading at all on all four connections. 0 ohms. I followed Mike's instructions. Am I missing something? If all of the glow plugs are bad I should have a code?
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Thread Starter
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From: Lake of the Ozarks
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Good luck on your wrist surgery, I can empathize. I had hand surgery (dupuytrens contracture) 3 weeks ago, one cataract surgery 2 weeks ago, and go in for my other eye on Thursday. Tired of seeing doctors and being on "restricted duty"! It adds to my forum post count though.
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From: Lake of the Ozarks
Thanks Mark, this is my 8th overall surgery. 4th in the past year. I'm medically retired, but being out of commission sucks.
And thanks for your help, I'll get it started eventually!
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Early failure could be just a matter of you being the guy hit by that 1 in 100,000 (or whatever) statistics.
Just make sure that your alternator output voltage is good when starting up. Others can jump in w/ better input than mine, but the glow plugs have a high limit on voltage - 14.5v or 14.8v IIRC?
Also, don't cycle the glow plugs. When you turn the key on, just wait a bit. The glow plugs will stay on as long as they need to. No need to turn the key off and then on again. Glow plugs operate on the Barometric pressure sensor, the Engine Oil Temp sensor, and system voltage. Make sure they are all healthy and working properly.
Personally I would track down the reason for the IAT2 code. I don't think it plays a role in the glow plug operation, but who knows!
Just make sure that your alternator output voltage is good when starting up. Others can jump in w/ better input than mine, but the glow plugs have a high limit on voltage - 14.5v or 14.8v IIRC?
Also, don't cycle the glow plugs. When you turn the key on, just wait a bit. The glow plugs will stay on as long as they need to. No need to turn the key off and then on again. Glow plugs operate on the Barometric pressure sensor, the Engine Oil Temp sensor, and system voltage. Make sure they are all healthy and working properly.
Personally I would track down the reason for the IAT2 code. I don't think it plays a role in the glow plug operation, but who knows!