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Discussion Starter #1
I have a 2006 F-250 with the 6.0, recently had a new oil cooler and EGR Delete put on, Replaced the Tanny with a Rebuild from Monster Tansmission out of Florida, Been having issues with lack of power, (injectors failing, turbo vanes sticking ect.), 5 weeks ago I tore it down and pulled the heads took them and had them check for warped, cracks ect., all valves and heads checked out ok, installed a set of ARP head studs, Ford head gaskets, Updated Dummy Plugs, & Standpipes, New Garrett PowerMax Turbo, New set of Injectors, and Glowplugs, once I got the Engine reassembled everything has worked fine other than a Hard Start after the engine get's cold, when it get's down to freezing temps the truck is almost impossible to crank, initially I was showing 2 codes for glow plugs, I had damaged the glow plug wires when I tore the engine down trying to pull the plugs off the glow plugs so I figured that was the issue, I then went ahead and ordered a new set of wire harness and also bought a new FICM with the Atlas 40 Programing, installed all that and now I am showing the following codes, P0671, P0672, P0673, P0674, P0677, & P0678, which are all Glow Plug Circuit's I don't know what else to replace to fix the issue unless I got a bad set of glow plugs any thought on this issue??????
 

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could be a glow plug module which sits by the valve cover on the passenger side. are the connectors that plug into the glow plugs damaged as you only have 6 colds so looks like 2 are working.

thinking the glow plug control module needs replacing. I would go with a Ford module over any other one out there. if you go to a dealer the retail price is $184 but google Tousley Ford Parts and it's about $115 plus about $10 shipping if you're not in MN
 
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Discussion Starter #3
Yeah the Plugs are New I just went ahead and ordered the whole new harnesses for both sides and replaced same, haven't checked the module, I was wondering if there was a relay or something for the GP's, but what has me puzzeled is why 2 are still working and 6 are not?, hard to believe 6 out of 8 new GP's are bad, also I have noticed over last couple years the buzzing sound on the injectors just sounds weak to me, when I first got the truck and you turned that key on they would get after it, it even sounds the same after putting the new injectors in, I'm wondering if the PCM would have anything to do with the injector buzzing?,
 

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With the engine cold unplug the glow plug harness from the GP module and ohm out the glow plug harness from each connector pin.

With the negative lead of your ohm meter attached to the engine, probe each pin with the positive lead...each glow plug should read under 1.2 ohms...if not, then you have bad glow plugs or harness.

Have seen where a corrupted cutom tune has kept the glow plugs on and melted most or all of them.

If all glow plugs ohm out under 1.2 ohms, then like mentioned, its either your GP module or a power supply issue.

Harry
 
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It wouldn't explain the codes but how old are the batteries? When you say hard to crank do you mean starting or actual cranking speed? Are you running 15w-40? Might be a combo of things.
 
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Discussion Starter #6

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If the engine physically turns harder after the repair work was done it is extremely likely that it is an assembly issue. While an internal problem is possible, it's more likely that it is an external issue. The first thing I would check is to make sure that you don't have an accessory failure as a result of the assembly like a bound power steering pump or a bad water pump or alternator. The next thing you need to check is to make sure that all of the engine grounds were properly attached to the correct points this is a big one because if the grounds aren't there the engine will be struggling to get enough current from the battery to crank over and for the glow plugs and the FICM to function properly.


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Discussion Starter #8
Ok for clearification, It does not have a problem turning over the problem is the engine has an issue cranking when its cold, it 50° F here this morning and it took me 10 min to start and it was blowing unburnt diesel smoke like crazy till if finally cranked up, I'm gonna try what Harry recommended on the checking ohm's on each glow plug, I just can't figure out why 6 out of 8 GP's are bad and they are brand new, I think the possibility lies on what Harry said about the custom tunes, I have 2 different sets loaded into my SCT Livewire, (1 set from Charles @ KEM Performance) & (1 set from MPT Diesel Tuning), I like the Bazooka Tune from MPT, But im thinking I better stick to the Race tune from KEM that Charles Made, I just like the power and tranny shift pattern from the bazooka tune its putting out twice the power on that setting, But I'm leaning towards reliability also not sure about the tuning issues affecting the GP's, but I have pretty much rebuilt and replaced every piece of this engine, and as stated before, I put new GP's, Wire Harnesses, FICM, and Batteries, now showing 6 codes for the GP's., also do any of you know why the buzzing sound on my injectors sounds weak? I have put 2 new FICM's in and they sound the same after each replacement?, I have wondered if I need to carry it to the dealership and let them flash the pcm and/or reset it? any thoughts???
 

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Ok, so if the turning of the engine is not an issue, I'd strongly suggest following Harry's suggestions. I'd strongly suggest checking the power and grounds on the FICM and the glow plug module to make sure that both of them are operating off of the correct power supply and have adequate grounding to get proper function. By a process of elimination if the problem only occurred after you worked on the truck then the problem has to be somewhere in something you worked on when you worked on the truck.


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Discussion Starter #10
Ok Guy's got the issue resolved, and a Big Thanks for the input, I went ahead and bought new Beru/Motorcraft Glow Plugs, The other set was new but a cheap brand set of GP's (Wellcraft), I would not recommend anyone purchasing those as they were new and 6 out of eight of them were bad (Burnt out and Swelled out tip's), I installed the new ones and no more codes and no more hard cold starts, in addition I installed and added a Ford heater element and elect. cord, I see no more issues with cold starts, but it is amazing to me how much of an effect a faulty glow plug/plugs can effect your 6.0 after it set's and cools down into the freezing temps, Again Thanks Guys!!!
Regards,
Craig
 

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Old thread but anyway some time ago I also had some problems with the conditioner and I didn't know how to solve it.
The problem is that this was the winter when the pandemic had already started and I didn't know what specialists to look for because I was afraid of coronavirus.
In the end, I realized I had no choice and I found a company Aircon Servicing, Cleaning & Repairing Singapore | SoCool Pte Ltd that helped me. The day I called them, they also sent craftsmen and everything was resolved. Since then my conditioner works very well and I have no problem.
 
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