ecu???
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Mountain Pass
Joined: Nov 2020
Posts: 220
Likes: 34
From: Orcas Island
ecu???
Hi friends, I finally got the new windshield installed, now I'm tackling the electrical system. The fuse/gem panel seems to be entangled with a heavy wiring harness from the steering column. I will also be replacing my park brake assembly. The ecu? not sure wth ford calls it, is in my way. I have disconnected the wiring harness in the engine bay, removed the only 2 fasteners I can find. I can wiggle it around, and the piece of the bracket that seems to hold it in place will slide aft about an inch, but it refuses to let go and come out of there. It is difficult to see if anything else is holding this to the truck. What am I missing???
Logistics Pro
Joined: Oct 2011
Posts: 3,953
Likes: 120
From: Mcdonough, GA
If you're talking about the PCM (Power-train Control Module) then it is removed from inside the cab near the parking brake. The fastener for the electrical connector is in the engine bay and is in the middle of the connector. remove the cover inside the cab next to drivers foot to complete the removal by removing 2 screws.
Video to help
https://duckduckgo.com/?q=installing...0PGo&ia=videos
Video to help
https://duckduckgo.com/?q=installing...0PGo&ia=videos
Postmaster
Joined: Nov 2015
Posts: 4,807
Likes: 125
From: Colorado Springs
The PCM is held in place by a 10 mm bolt on the engine side of the firewall. The bolt backs out of the PCM but stays in the “plug”. Essentially the bolt pulls the PCM and the plug together. I recommend a 1/4” socket or a Gimbal Ratchet...you don’t want to break the bolt off! Once the bolt is free off the threaded insert in the PCM itself, you’ll have to wiggle the plug free...if the PCM has never been removed there’s 20 years of dirt holding it in place. Grab the plug not the wires... The first time I removed it I actually went in there with a small can of WD-40 and had to spray the plug to wiggle it free.
Thread Starter
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Mountain Pass
Joined: Nov 2020
Posts: 220
Likes: 34
From: Orcas Island
If you're talking about the PCM (Power-train Control Module) then it is removed from inside the cab near the parking brake. The fastener for the electrical connector is in the engine bay and is in the middle of the connector. remove the cover inside the cab next to drivers foot to complete the removal by removing 2 screws.
Video to help
https://duckduckgo.com/?q=installing...0PGo&ia=videos
Video to help
https://duckduckgo.com/?q=installing...0PGo&ia=videos
Logistics Pro
Joined: Oct 2011
Posts: 3,953
Likes: 120
From: Mcdonough, GA
Are you in a super duty or OBS
Logistics Pro
Joined: Oct 2011
Posts: 3,953
Likes: 120
From: Mcdonough, GA
Interesting, didn't know they mounted differently in other SD's
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Butt-Head
Joined: Apr 2004
Posts: 9,453
Likes: 2,936
From: Reed Point, MT
They don't.
Automatic transmission trucks can get by with simply removing the two 7mm-headed bolts on the plastic carrier and forcing the PCM to the passenger side and then rearward. For manual transmission trucks (where the clutch pedal assembly gets in the way), it's easier to remove the whole metal bracket by removing the 10mm-headed bolt above the park brake pedal assembly and the 10mm nut underneath the PCM bracket.
Automatic transmission trucks can get by with simply removing the two 7mm-headed bolts on the plastic carrier and forcing the PCM to the passenger side and then rearward. For manual transmission trucks (where the clutch pedal assembly gets in the way), it's easier to remove the whole metal bracket by removing the 10mm-headed bolt above the park brake pedal assembly and the 10mm nut underneath the PCM bracket.
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Thread Starter
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Mountain Pass
Joined: Nov 2020
Posts: 220
Likes: 34
From: Orcas Island
They don't.
Automatic transmission trucks can get by with simply removing the two 7mm-headed bolts on the plastic carrier and forcing the PCM to the passenger side and then rearward. For manual transmission trucks (where the clutch pedal assembly gets in the way), it's easier to remove the whole metal bracket by removing the 10mm-headed bolt above the park brake pedal assembly and the 10mm nut underneath the PCM bracket.
Automatic transmission trucks can get by with simply removing the two 7mm-headed bolts on the plastic carrier and forcing the PCM to the passenger side and then rearward. For manual transmission trucks (where the clutch pedal assembly gets in the way), it's easier to remove the whole metal bracket by removing the 10mm-headed bolt above the park brake pedal assembly and the 10mm nut underneath the PCM bracket.
Last edited by bewildered 7.3; Dec 24, 2020 at 03:39 PM. Reason: Add photos
FTE Leadership Emeritus
Joined: May 2014
Posts: 27,354
Likes: 5,946
From: Lake Hartwell, GA
Riffraff sells the plastic case for $12 and change if you feel like replacing yours.
https://www.riffraffdiesel.com/pcm-cover-99-03/
https://www.riffraffdiesel.com/pcm-cover-99-03/
Thread Starter
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Mountain Pass
Joined: Nov 2020
Posts: 220
Likes: 34
From: Orcas Island
ok, so #1, this rig came with a TS Performance chip in it, that didn't do anything different in any position. The guy I bought it from had the switch unplugged, said it screwed with the performance... yeah, well, maybe... I think that was the idea...lol. Anyway, the link that Paul, AllaboutMPG , posted above showed the procedure for installing a chip. I took the pcm out of the shell and there was still silicone on the terminals, so I have that cleaned up and back together. I'd like to hear some thoughts on the TS Performance chip with 6 position switch, any good? POS? anyone have or had one, liked it or not?
#2, the GEM connectors look clean, but the connectors for the fuse panel need some work. Can anyone guide me to a page for things to inspect or check on the GEM while I have it out?
#3 Have a great Christmas everyone!
#2, the GEM connectors look clean, but the connectors for the fuse panel need some work. Can anyone guide me to a page for things to inspect or check on the GEM while I have it out?
#3 Have a great Christmas everyone!
FTE Leadership Emeritus
Joined: May 2014
Posts: 27,354
Likes: 5,946
From: Lake Hartwell, GA
ok, so #1, this rig came with a TS Performance chip in it, that didn't do anything different in any position. The guy I bought it from had the switch unplugged, said it screwed with the performance... yeah, well, maybe... I think that was the idea...lol. Anyway, the link that Paul, AllaboutMPG , posted above showed the procedure for installing a chip. I took the pcm out of the shell and there was still silicone on the terminals, so I have that cleaned up and back together. I'd like to hear some thoughts on the TS Performance chip with 6 position switch, any good? POS? anyone have or had one, liked it or not?
#2, the GEM connectors look clean, but the connectors for the fuse panel need some work. Can anyone guide me to a page for things to inspect or check on the GEM while I have it out?
#3 Have a great Christmas everyone!
#2, the GEM connectors look clean, but the connectors for the fuse panel need some work. Can anyone guide me to a page for things to inspect or check on the GEM while I have it out?
#3 Have a great Christmas everyone!
https://www.ford-trucks.com/forums/1...-7-3l-psd.html
Butt-Head
Joined: Apr 2004
Posts: 9,453
Likes: 2,936
From: Reed Point, MT
Just a word of caution:
Make sure you install the chip correctly and don't fiddle with it once it is installed and working. If irrepairable damage is done to that DPC-452 PCM, they are a hefty chunk of change to get a replacement unless you get real lucky.
Make sure you install the chip correctly and don't fiddle with it once it is installed and working. If irrepairable damage is done to that DPC-452 PCM, they are a hefty chunk of change to get a replacement unless you get real lucky.
Thread Starter
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Mountain Pass
Joined: Nov 2020
Posts: 220
Likes: 34
From: Orcas Island
There is quite a bit if information pertaining to the GEM in the 7.3L PSD Tech Folder sticky thread. FTE'rs have been great contributors to the Folder and it is an incredible resource.
https://www.ford-trucks.com/forums/1...-7-3l-psd.html
https://www.ford-trucks.com/forums/1...-7-3l-psd.html