Trying to understand glow plug system
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Cargo Master
Joined: Jan 2009
Posts: 2,800
Likes: 31
From: OKC, OK
Agreed. My Oil in the morning of 60 degree night is around 64. If your oil temp is 107 I would start their. I found the published for numbers for when things should happen are not always the most accurate.( At least for my truck) If nothing else you at least will have your oil temp sensor working for the other things.
Hotshot
Joined: Jan 2002
Posts: 17,988
Likes: 207
From: La La Land
The (point) .7 volts indicates the PCM's grounding circuit IS working. The output is what is called "open collector", and the .7 is a "junction voltage". All normal.
That's a GOOD thing!
You are on the right track, but I wouldn't put the Stancor into "standby" service, I would USE it!
It's a far better relay.
Pop
That's a GOOD thing!
You are on the right track, but I wouldn't put the Stancor into "standby" service, I would USE it!
It's a far better relay.
Pop
Post Fiend
Joined: May 2009
Posts: 5,470
Likes: 3
From: Pea Ridge, AR
So I went out this morning when I knew the engine would be cold. Temp is 58 here. I tried to start and no dice. I wen and tested the relay and had .7v at the PCM input and nothing at the glow plug output. Then I heard it click and I had 12v at the PCM input. Then I jumped the relay and what do you know sh started. Looks like its jus the relay. Thank God! I wil swap in the AIH relay and get a stancor for standby.
Elder User
Joined: Feb 2006
Posts: 765
Likes: 1
From: Eastern Ohio
I think you did too. You must have posted that while I was typing.
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Cargo Master
Joined: Jan 2009
Posts: 2,800
Likes: 31
From: OKC, OK
I actually have a fuel pressure gauge coming in So I will be swapping my 3 gauge pillar for 4 gauge and I will do it at that time
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Post Fiend
Joined: May 2009
Posts: 5,470
Likes: 3
From: Pea Ridge, AR
Just giving you a hard time. For those that may not have a pillar or want an LED anywhere you could always use a plug in voltage monitor that goes in the aux port and watch the voltage drop to know if the GP system is functioning properly.
Hotshot
Joined: Jan 2002
Posts: 17,988
Likes: 207
From: La La Land
Pop
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Cargo Master
Joined: Jan 2009
Posts: 2,800
Likes: 31
From: OKC, OK
So it was the relay, I tried swapping the AIH relay with the GP relay but they are different. The base on the AIH is bigger and would not fit in the other location. I ended up just stretching the wires. Luckily they were long enough. I will still get a stancor, but I just didn't wan to be stuck if it gets cold again.
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blue66tang95f150
1994.5 - 1997 7.3L Power Stroke Diesel
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Sep 19, 2017 03:28 PM