i get the injector circuit low codes all cylinders. I had this happen before about 75000. Yes got a new ficm. Still had a rough running engine, then the shop replaced number one injector and it ran like brand new.

Maybe 20,000 mile later, low on fuel it would kick out all the same codes. I would clear them and then go 5-10000 with out codes. Then they would come back again always low on fuel. I would clear them. This would go on to about 115000. Lately they would not clear. Truck still runs great and get awesome milage.

Truck was running great. Then l let it sit for about a month. Went to start it in the morning about 70 in south florida. It ran rough and kicked black smoke for a 5 sec and then ran like normal. Even after sitting for eight hours of work . It would start rite up and idle great, only in the morning it would idle rough for about 5-10 seconds.

One morning I even cycled the glow plugs for about 5 times and it only ran rough for only about a second if anything. Now i am in south carolina at my cousins and it has been warm. Same thing every morning 5-10 seconds.

But not today the cold has come back and it was cold this morning. I went to start it, cycled the glow plugs a few time and now I can't even get it to start. I am thinking it might be the glowplug control module since it has all cylinder codes to at least the glow plugs.

I also just plugged in the heater block to see if I can get it started in a little while. Any thoughts?

Happy New Year

 

Yep if you plug the block heater, and it starts better, then your thought is in the right track, to see if the modual is doing something see if you can probe, with a volt meter, the glow plug and see if you get 12V when you initially turn the key to cycle it. If there is 12 v then it's the modual issue, but if there is 12 then may have more then 3 or more glow plug issue

 

Thanks, I am not sure I understand your post. are you saying if there is not a 12v its the module?

 

Most likely, or you connection problems (harness) but I'd check first your fuse and relay too

 

Ok so last night I had the batteries and charging system tested. Batteries are ok 1200 cca , alternator good and starter.

So today I had some time to look around. I did notice a lot of green corrosion at the passenger battery terminal and the one feeding the GPCM. Took to off scrubbed it clean and put some diametric grease back on.

While looking at my scanner prior this < I had noticed the Voltage power cycling from 14,01-13.974. After cleaning Voltage power 14.275 constant.

So not to just through money out I checked the codes again. P0261,64,67,70,76,79,82. Circuit low. Usually a ficm and possible harness as well as injectors.

Again the problem only occurs in the morning when cold. In florida cold is 65.

This problem began when I was out for work for a week or so from a back injury. I went out to start it and it ran rough for a second or too and then idled as normal. This went on for a couple of days. At this time I had even used hot shot secret as a maintenance. There were about 3000 miles on it.

I decided to change the oil and went with 5w40 mobile esp full synthetic. I also heard about arch oil and bought some oil additive as well as the diesel additive. The first start up after the oil change was rough for about 25 seconds.

It would continue to run rough each morning for about 5 seconds and then idle normally. Even after a 8 hr day the truck would start and idle fine. Only overnight would it start rough.

Just before a trip to SC for christmas I started to think it might be the glow plugs. So the morning I left I cycled the glow plug 4-7 times. The truck started right up with any roughness. I even cleared the codes and started to drive up to SC.

Truck ran great avg 16mpg. No codes till about 500 mile in , making the right hand turn getting on I26. All injector codes as above. Once in SC, the morning start were begging to get worse and worse as in it would run rough for about 20-30 second.

Then on a 32 degree morning no fire . Cranked fine, but no fire. Plugged it in and 2hr later started but rough for about 20 seconds.

Plugged it in overnight and starts right up. I have been doing this for a week or so. Now it seem if i don't plug it in overnight it is getting harder and harder to start.

Should I get a rebuilt ficm since i have the eight injector codes? Then go form there maybe a GPCM?

 

Checked the voltage on the ficm. 45 V while the injectors cycled and 48 when they stopped.
When the truck was idling 25 V.

So I ordered a new ficm. Got it next day and finally put it in today. Truck fired right up and sounds awesome. Got it on eBay from dieseltechron. He awesome.

While I was waiting for the ficm, I decided to do a coolant flush. After doing some research here I have decided to go with a ELC coolant instead of gold. I just replaced my oil cooler and egr maybe 10-15000 mile back. I believe oil cooler fails are from the silicate. So I'm not using silicate antifreeze any more. I wish I new this information sooner.

I also got a gal of restore, yes finding it was a job in itself. They say it is the best for getting out silicate. I got it a cummins power south in miami, 25 plus tax.

For the antifreeze I am going with Peak Final Charge. I got concentrate too , finding it was another project. but I got it at napa. Walmart and pep boys have 50/50 mix only.

 

I too ditched the ford gold and went with Zerex zxed1, it is a cat 1 rated coolant good for 750000 miles with no silicates to plug up your oil cooler. Got it at Napa
For the block cleaner I used the ford VC9 its about 20 bucks a bottle (you need 2) first coolant flush it came out black like motor oil. I ran 25 gallons of distilled to get remnants out and put a coolant flter on as well, getting ready to open up filter to see how much trash was in cooling system.

 

I did my first flush at 80,000. I used some prestone or peak supper flush a couple of times and then the vc 9. Didn't help. I think my egr went out around 110,000. So i replaced it and a new oil cooler. I did not get to see the inside of the oil cooler as a shop did it.

But after all my research recently . Thanks to these forums. I found some great stuff. I now believe the 6.0 is actually a good truck.

The egr, oil cooler, head gaskets and bolts are all due to COOLANT! Even some problems with injectors. The gold sucks, can't handle the heat. They probably started to building the 6.0 in 2001. At that time gold was good technology. But due to tougher emissions things got tricky. EGR, exhaust gas is HOT! The coolant takes a beating cooling it and when it can't, there goes your head gaskets.

The problem is the silicate goop left in the engine from failed gold. They say low silicate level