glow plugs
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More Turbo
Joined: Feb 2005
Posts: 574
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From: Grand Rapids,MI
glow plugs
which sensor sends a signal to the FICM to energize the glow plugs , truck is a late 04 ICP in valve cover, new glow plugs, harnesses and control module. Running 5-40 synth, starts great when plugged in , long crank with 6.4 starter till it fires off runs ruff for a second then smooths out
Fleet Owner
Joined: Nov 2003
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The PCM activates the glow plugs by communication with the GPCM. Primarily oil temp dependent, but PCM also looks at battery voltage, and Baro according to the PC/ED.
Oil must be 131*F or below for glow plugs to operate. Above 131 *F, the PCM will still bulb-check the Wait-To_Start light.
Oil must be 131*F or below for glow plugs to operate. Above 131 *F, the PCM will still bulb-check the Wait-To_Start light.
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More Turbo
Joined: Feb 2005
Posts: 574
Likes: 3
From: Grand Rapids,MI
so is the PCM part of the FICM or is a separate box and where is it located, I just put in a new oil temp sensor when I did some work and fixed a leak not one of 3 dealerships could find when the truck was new.
Fleet Mechanic
Joined: Jul 2018
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From: Jacksonville Florida
I'm trying. But I'm lost. I'll keep following. See what happens.
Fleet Owner
Joined: Nov 2003
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The PCM (Powertrain Control Module) contains the ECM (Engine Control Module) and the TCM (Transmission Control Module), The PCM communicates with the FICM (Fuel Injection Control Module), which is a separate module. The PCM sends the FICM the appropriate engine parameter data (from sensors as well as calculated parameters) necessary for the FICM to properly control the injector operation.
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Fleet Mechanic
Joined: Jul 2018
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From: Jacksonville Florida
Pcm is on the drivers side fender wall. GPM is under your icp senser on the passenger side valve cover. So many abbreviations ya can't keep track.
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Fleet Owner
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The Glow Plug Control Module is abbreviated GPCM, the PCM is the Powertrain Control Module. It, the PCM, will tell the GPCM when the glow plugs need to be on.
It is used on every cold start (unless the oil temperature sensor is bad and reads over 131 *F. It may not be 100% required on 40* starts, but it helps.
There are a TON of acronyms for sure!
It is used on every cold start (unless the oil temperature sensor is bad and reads over 131 *F. It may not be 100% required on 40* starts, but it helps.
There are a TON of acronyms for sure!
Fleet Mechanic
Joined: Jul 2018
Posts: 1,629
Likes: 103
From: Jacksonville Florida
As always Sean keeps us in line with correct terminology of our conversations with these beasts. Thanks Sean
Now as far as cold, this 6.0 is in N. Fla....35° this morning. Not something we like.
Have a good day gentlemen.
Now as far as cold, this 6.0 is in N. Fla....35° this morning. Not something we like.
Have a good day gentlemen.
Fleet Mechanic
Joined: Jul 2018
Posts: 1,629
Likes: 103
From: Jacksonville Florida
Yah well truth be told there are 4 really smart guys when it comes to the 6.0's. You know who you are. I will say for me and most that follow this forum, thanks for the knowledge!! 