Ford 7.3L Power Stroke (1999-2003) :: Glow Plug Bypass With GPCM?


Apr 9, 2017

I've read what little information I can find about making a glow plug bypass, but everything so far applies to trucks with glow plug relays. Since mine is an Excursion I have a GPCM instead of a relay. How I might accomplish this?

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Ford 7.3L Power Stroke (1999-2003) :: Code P0670 - GPCM Glow Plug Control Module Control Line Failure

How to fix SES P0670?? I understand there's a whole procedure on checking fault.

P0670:GPCM Glow plug control module control line failure. Open/grounded circuit, open/shorted GPCM, failed PCM

But how did you resolve problem? replaced GPCM, found open circuit, short --if so where?-- or replaced with updated harness.

(4C3Z-12B568-AA connector upgrade kit as in picture)???

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Ford 7.3L Power Stroke (1999-2003) :: Glow Plug Change / Oil In Turbo

I'm getting ready to change the glow plugs in my dad's e99, 196k on the clock. When I pulled the air intake tubes I found some oil in the turbo:

The inlet tube also had a bunch of gunk in it too:

Does this look like it is caused by the PCVor is it a bigger issue?

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Ford 7.3L Power Stroke (1999-2003) :: Re-torque During Glow Plug Replacement?

I will be changing all the glow plugs in a few days. Should I re-torque the head bolts or anything while I am in there? Don't want to button it back up and then wish I had done something while in there.

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Ford 7.3L Power Stroke (1999-2003) :: Broken Glow Plug Outer Wall

Well I just "did" the glow plugs on my recently acquired 99 7.3 and while 7 came out with no problem, one of them gave me more resistance when turning than expected and then "snap". Now here is the interesting part. What actually came out is the threaded top portion of the outer wall, while the rest of the outer wall and the electrode are still in the block. I have done a lot of searching and it seems that usually the electrode detaches from the outer casing and the entire outer casing comes out with only the electrode or part of the electrode stuck in the shaft (usually due to carbon buildup or swollen tip). In this case though, the outer wall of the plug sheared in two, which seems to imply that the outer wall itself is what is stuck in the shaft and not the electrode. The attached picture hopefully explains what I am trying to say.

I can easily latch on to the end of the electrode with some vice grips, but even if I managed to get that out, I would still have the outer wall of the plug in the hole. At the moment I just screwed the threaded part back in to keep the everything from blowing out so I could crank the truck. It cranked right up and seems to run fine. My inclination is to just leave it as is and hope that 7 good glow plugs will do the job, as I have some nightmares about making things worse in trying to make them better. Any chance of the electrode falling into the cylinder if this much of the outer case is still there? How to remove stuck electrodes, etc. but none on a stuck outer casing?

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Ford 7.3L Power Stroke (1999-2003) :: Glow Plug Control Module Function?

OK, what does a glow plug control module do? The short bus I got has one on it. It looks like it fits right into the circuit without much, if any, modification. I got one with my short bus and am curious if it would be something worth adding to my pickup. So...what does it do and could I/should I install it?

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Ford 7.3L Power Stroke (1999-2003) :: Truck Won't Fire After Glow Plug Replacement Unless Plugged In

​​​I just replaced the glow plugs, gpr, valve cover gasket and harness. When cooled down, cranks but won't fire. Smoke DOES come out the tailpipe. If I plug it in for awhile it fires right up. What else can I do or check?

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Ford 7.3L Power Stroke (1999-2003) :: 2001 E450 - No Ground To Glow Plug Solenoid?

I have no ground to glow plug solenoid, wiring is ok right up to the computer. Where I should go from there?

Its a 2001 E450 PSD. glow plugs not coming on at all.

should I be checking an engine temp sensor?

I don't have a wiring diagram so I am going in somewhat blind. ]

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Ford 6.0L Power Stroke Diesel :: 2003 - Leaking From The Glow Plug Harness

Got a 2003 6.0 that seems to be leaking from the glow plug harness. How hard would it be to just replace them? I've heard that trying to remove these things can be a pain because they almost always break. But if I'm just going to replace them who cares right?

Is there anything I need to be careful about? Or can I just rip em on out? Also I've noticed two different styles of harness should I replace mine with the other style or just keep it the same? And yes those valve cover nuts are loose. I'm aware

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Ford 7.3L Power Stroke (1999-2003) :: IPR CF2 Bypass High Flow Coolant Filter

IPR CF2 Byasss High Flow Coolant Filter Ford 6.0

Made for the 6.0, the biggest problem on the 7.3 might be finding real estate for the filter assembly.

One review refers to using it on a 7.3.

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Ford 6.0L Power Stroke Diesel :: Glow Plug Replacement?

I have to replace the #6 glow plug. I confirmed it is bad and the harnes broke when trying to reove it with the proper tool. I ordered a new glow plug, ZD13, and a new drivers side harness.

I have never replaced a glow plug before but it seems pretty straight forward. I watched some youtube videos and did some reading.

I have read some state that you have to loosen the glow plug with a 10mm socket and then take some tubing and push it onto the glow plug to finish loosening it and prevent it from falling into the cylinder. I have read people saying it took them hours with a magnet to get the plug out of the cylinder.

If the plug is threaded and is removed from the threads how is it possible for it to fall past the threads into the cylinder?

Anything special I need to know? Anti-seize on the threads and dielectric grease on the connection? What the torque spec is?

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Ford 7.3L Power Stroke (1999-2003) :: 4r100 Transmission - How To Bypass Neutral Safety Switch

I have the 4r100 transmission how do I bypass the safety switch? Also what are your thoughts on starting the engine with the transmission out? I know to bolt the spacer plate to the engine.

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Ford 6.0L Power Stroke Diesel :: Every Glow Plug Code At The Same Time?

Just happened to check codes today for fun and found something interesting. I've known about 2 or 3 glow plug codes since last winter but I looked today and I have a code for every single circuit. Thought that was kind of odd.... I already have 8 brand new plugs and both harnesses from Autonation sitting in the back seat, was just waiting till the fall to change them out. At 176k on the originals I decided to change them all. But now I'm thinking the GPCM may be faulty as well.

P0671 Cylinder 1 Glow Plug Circuit
P0672 Cylinder 2 Glow Plug Circuit
P0673 Cylinder 3 Glow Plug Circuit
P0674 Cylinder 4 Glow Plug Circuit
P0675 Cylinder 5 Glow Plug Circuit
P0676 Cylinder 6 Glow Plug Circuit
P0677 Cylinder 7 Glow Plug Circuit
P0678 Cylinder 8 Glow Plug Circuit

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Ford 6.0L Power Stroke Diesel :: Glow Plug Light Came On - Lost Power - No Injector Cycle

Ok yesterday while driving my truck the glow plug light came on couple times and lost power but the light would turn off and power came back. It has done this before and it was the injector harness grounding out on the engine. I replaced that last time. I checked over the knew one and did not see any chaffing on the harness.

Now this morning I go outside to start it and I can hear my fuel pump and vacuum pump but injectors wouldn't cycle. It has also done this before but I could never figure out why. Last time I tore into it checking through my wiring harness and couldn't find anything. When I put it back together it started fine.

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Ford 6.0L Power Stroke Diesel :: Truck Lost Power And RPMs Dropped Only Glow Plug Light Came On

It's a 2004 6.0 excursion with about 190,000 miles. At 185,000 I pulled the motor and did new oem head gaskets, Arp head studs, bulletproof egr cooler and oil cooler system, bulletproof 48v ficm, strictly diesel regulated return, and I've been running gear heads srl tune before and after the truck was rebuilt.

Recently the truck has been acting up at random times. While running the gear head srl tune, the truck will lose power, the boost gauge on my edge insight will get stuck along with Icp psi, the water in fuel light and glow plug light will come on, and then after a few seconds it will clear itself and run fine. Last night I was on a two lane road and putting my foot into it and the truck did the same thing where it loses power, but this time the truck actually died on me while I was cruising at 60.

Same lights were on but this time the cruise control light fluttered while the truck was in the midst of dying. I tried restarting it and it took two sets of cranking before it fired and stayed running. On the way home I babied it and the truck lost power and the Rpms dropped and only the glow plug light came on. Got home and ran codes and I got camshaft and crankshaft position sensor codes and I tuned it back to stock, drove it around, and the truck ran fine, but while on a stock tune I am getting a egr valve code.

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Ford 6.0L Power Stroke Diesel :: Leaking Glow Plug Harness Cause Hot No Start

Could a leaking passenger side glow plug harness cause a "hot no start?

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Ford 6.0L Power Stroke Diesel :: Glow Plug Cylinder 8 - Code P0678

Pulled p0678, glow plug 8. I've changed out the glow plug on cylinder 1 a few years ago.

Cylinder 8, being on the driver side rear, is it difficult to change out? Should I just pay Ford or another shop to fix this?

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Ford 6.7L Power Stroke Diesel :: Glow Plug Fell Inside The Cylinder

I would like to know if i am the only one that had that problem... a few weeks ago, I had to stop and get the truck towed to the dealership and they told me that my engine was shot. Then they told me it was a glow plug that fell inside the cylinder... didn't know it was possible but any way it was under warranty.

Last Monday they asked me to bring all my service receipt and that ford is asking them to take the engine apart and study it before they would ship a new engine... Are the trying to get away from paying it under warranty? The truck is 2011 with 80000 km (50000 miles).

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Ford 6.7L Power Stroke Diesel :: 2014 - Removing Glow Plug Harness?

I'm really struggling to get this sucker off my 2014 6.7 F350

it says in the ford manual to lift the plastic tabs then pull off, I did that easily with 3 on each side, but the end plug on each side (the one closest to the windshield) does not seem to have a liftable tab (it looks different to the others as its at the end of the cable)

I've almost broken it but not quite, its over $300 for new harness, ouch

I do have the odd little hook tool they sell for this, it worked with the other 3 for sure, but I've spent ages on the 4th on each side and cannot budge either of them

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Ford 6.7L Power Stroke Diesel :: CEL Code P263C For Glow Plug Driver Performance

CEL came on in my 2013 6.7L with 74K miles a couple days ago. Pulled the code today and it was a P263C - Glow Plug Driver Performance code. Any remedy for this.

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Ford 7.3L Power Stroke (1999-2003) :: F250 Won't Start After Glow Plugs And Gpr Replaced

I replaced the glow plugs and gpr and the truck won't start. I'm also having to replace the water fuel separator. What is going on? 1999 F250 7.3l ....

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