So if it's mid fourties it should be warm enough not cause this problem? You think?

I think another one of my problems is the truck usual sits all week not being driven. I drive a company truck thru the week.

 

Everything I have read and heard says above freezing no problem but letting it sit for a week will also cause the same issue when it is cold out. Mine does the same thing every time it gets down to the very low 40s or lower for an extended amount of time. The lower the temp the worse it gets but it only does it the first start of the day and looking back it does get worse if it sits for a couple of days.

 

I have a similar problem. I live south of Houston so I have no problems with the cold. I am to the point where if I do not have my block heater plugged in, my truck will crank and will barely run. This I am sure is tied to a GPCM that has gone out. First question is, are there any write-ups similar to the FICM soldering repair that can be performed to the GPCM? PLEASE READ ON. Next issue. Once I get the truck started, if it is a cold start the truck runs rough until warm. As I accelerate the truck sputters and runs like poo. Even after the truck has been warmed I get the sputtering and loss of all power while accelerating past 2000 RPM.

Now before any suggestions are relayed to me, here are circumstances in regards to my truck...

I have a 2006 F250 6.0L, cold air intake, recently cleaned the filter. I run the pre-programmed SCT flash tuner and the tuner died on me when I tried to plug it in this week.(dealing with SCT in the meantime). I have no CAT nor muffler. I have been running this configuration for over a year now with no problems. I do not have any white smoke on start up or idle. I was throwing check engine lights prior to me cleaning the air filter but since have not thrown anything. I have already disassembled the FICM and soldered all of the resistors even though the voltage was just fine when I checked it. I have adequate pressures with the oil. I have taken it to the dealer within the last year and had the new flash updated. I can't think of anything off the top of my head else to put on here. I have read thread after thread with nothing.

Please help peeps... much appreciated!

 

Well finally someone who gives a decent amount of info! Thanks!

Do you have the ability to get it on a scanner? I'd check desired ICP against actual ICP.

I've also read that a FICM reading good voltages can still be bad, if you have a buddy with a 6.0, it'd be worth while swapping FICMs to see if it changes, my guess is it wont, but worth a shot for how easy it is.

You could have some small high pressure oil leaks, does it have trouble restarting when it's already warm. Say you run in to grab beer and shut the truck off, come back out and it's a bitach to get started?

You could just have some sticky injectors or failing injectors. Have you had an oil analysis done ever? Might be worth it now to see if you have fuel dilution.

Who's SCT tunes are you using? Or am I mis-reading that? Are you using the canned tunes that come with the SCT? I'd get custom if you are.

I would definitely buy some Rev-X and try it. It is a mircale for curing sticky injectors. If that does it, it's probably in need of some injectors. Rev-X is kind of a band aid, but great for diagnosing. Your best bet is to get it on a scanner and have someone who knows what they're looking for scan it.

 

It doesnt have any trouble starting if it is warmed up. And when I initially took it to the dealership a year ago for the updated flash, they performed the cold amp start test and it was fine, but i know the GPCM is crapping out. I have an old buddy who works for the local Ford dealership, I can get it to him or have him bring home his scanner/laptop diagnostics if I can get ahold of him.. I have the default performance tune from the handheld SCT tuner. I am very upset that conveniently the tuner is dead at the moment. Still waiting on a reply from SCT people. Always wanted to get custom for my setup, want to bust 14s in the 1/4 with my baby - ran 15.00 with crap for tires. Anyways, wishing there was something i could take apart and solder for the GPCM. Thank you for the quick reply. It's a new hope.

 

Definitely true.

 

Well I finally found that I had a blown fuse which supplied power to the computer port so I was able to run my DTCs. They came out as P0261, P0264, P0267, P0270, which all stated Cylinder #_, Injector CKT Low. Strange but I checked the voltage from the FICM and had 45-48 volts. I will google and read into it more. Any suggestions I am still open to. Thank you for your responses in the mean time.

P.S. - Now that my SCT flash tuner works, where and who can hhok me up with the most productive custom tune? I'm also going to check for updates from SCT that coincide with the new flashes from Ford.

Thank you all again. (Damn it's hot here in Houston)

 

You have codes for injectors 1,2,3 and 4. ODD. Those are the front 4 cylinders too, so if it was a low fuel pressure issue, usually the back ones die first in a dead head system.

I would definitely find another FICM to try out on there. Have a buddy with a 6.0 anywhere near by?

As for tunes...

Most commonly used are:

Innovative Diesel
Gearhead
GoGo
QuickTrick (formerly DJ's).

 

I will look for a buddy with the 6.0. Is there any other fix for the FICM, other than replacement?

Mike, I like the stacks... any reference on dealer?

 

I can fix a FICM if it's a low voltage issue, but yours does not sound that way. From the sounds of it, it could be as simple as a loose plug on the bottom of the FICM, or the harness going from the FICM to the PCM might even have some chaffing to it... I'd try and push the plugs in all the way under the FICM, and I'd trace some of those wire harness' with a fine tooth comb.

Stacks are MBRP 4" SS 304 turbo back into 6"x36" mitres, powdercoated black. There's probably a TON of good diesel shops in Texas to get these at... myself, I got them second hand on powerstroke.org, brand new in the box still!