Well .... It happened. I have for a week suspected my batteries were getting weak. just slower cranking is all. I took my truck in to have a viper security system installed and while he was doing his work he killed the batteries. I saw him hook up a battery charger and started the truck. He pulled it around to me and explained how the system worked and off i went. 5 miles down the road, on the thruway, I notice a miss and I'm down on power. FICM looked ok, 48V and it was charging, 13.8 I thought I would bring it to my shop and load test the batteries. On my way here, the check engine light comes on. At the shop, load tested them and they were weak. Installed 2 brand new batteries, started it up, no difference. Hooked up the scanner and pulled a code P2077 (cylinder 6 injector circuit high) Now what? I'm not sure where to go from here. I'm guessing either the FICM went bad or the #6 injector? Ugggggghhhhh

 

When you checked your FICM voltage, did you check it both with ignition on, engine off and then with engine on?
I'm in process of receiving/installing a new FICM from FICMrepair.com.
I read a solid 48.5 Ignition on, engine off but with engine on it read 42.5.
Previouse to the check I was getting a p0276 code. Low circ #6 injector.
Engine was running normal. Next day, I drive it up the street and get P0282 (low circ #8) along with a P0611 (FICM Perf). I was also getting a slight miss.
I parked it. Waiting for new FICM.

 

Sorry ... Code is a P0277
KOEO FICM LPWR 12.0
FICM MPWR 48.0
FICM VPWR 12.0
FICM SYNC NO

KOER FICM LPWR 11.5
FICM MPWR 47.5 - 48
FICM VPWR 11.5
FICM SYNC YES

I have a snap on scanner so if more info is needed, let me know please ! Going to go check the harness at #6 injector and FICM Thanks !

 

Don't assume because you have good readings your FICM is not suspect. I had this with mine, truck was running OK, but just not quite the way it should have been.
I ended up needing a power board. I had an injector code at the time as well, but it was running good so didn't think much of it. It went away after I cleared it, however I sent the FICM in for the rebuild and tune, that is when I was informed the power side was bad.
Glad I didn't wait any longer. It's possible the alarm tech damaged the FICM, he was obviously using battery up.........he should have hooked up a battery charger, unless it would have interfered with his work.
It's also possible your power side was getting weak to begin with since you say you noticed the batteries seemed down. The alarm install might have driven the nail deeper.

 

Thanks ..... Ya, I'm not assuming anything at this point. Still trying to diagnose.

 

The FICM voltage checks can show good and the FICM still be bad.
The following is a link to some good info for troubleshooting.
6.0 Power Stroke FICM (Fuel Injection Control Module) Diagnosis | Diesel IQ
Here is an excerpt from that link.....

"Shorted coils (side shorts) or short to grounds produce high current which sets the injector circuit high codes (ie. P0262, P0265, ..., P0283)."

This will help you do a resistance test on the injector coil.....
Diagnostic Trouble Codes - P0261, P0264, P0267, P0270, P0273, P0276, P0279, or P0282 - Hot Shot's Secret®?

I'm a newbie to diesels but since i'm going through same thing right now and have done a lot of research i thought I'd help.
If all your harness/injector tests test good i would consider talking to Ed at FICMrepair.com. You'll probably end up sending your FICM to him.
They say that only short periods of low voltage to your FICM can kill it. I suspect the same thing happened to me when i was working on and cleaning my truck weekend before last. I think i ran the batteries down and that caused my issues even though the truck would start with no problem. Hope this helps.

 

Thanks for the links .... I did the injector coil tests and everything ohm'd out fine. Ohm'd out the wiring harness and that's fine. I just placed a call with Ed, waiting on his return call. I know so far it's pointing to a FICM but what's to say the injector isn't plugged? I see my FICM has a remanufactured date of aug / 09 ... Must have been replaced by the po.

 

Stupid question .... I just did an injector buzz test ... Same code came back, P0277 Cylinder #6 injector circuit high. Is it possible to swap the injectors and see if the code follows the injector or stays at #6 ? If it stays, FICM would be bad. If it moves to say #4 injector, Injector would be bad. Sound doable?

 

I just read on a different thread one of the "old salts' here suggesting to do just that for a similar situation so i would say yes. I've never pulled injectors but it sounds like a lot of work. I think i might wait to see what Ed says before I went that far.

 

UPDATE : To help anyone else whom comes across this code, I fixed it. While waiting on Ed's call, (still waiting) I went to ford and bought a new injector. I then unplugged #6 and plugged in the new one while leaving it in the plastic and laying on the valve cover. Ran a buzz test and everything was fine, no codes. R & R the injector with the new one and done. Runs fantastic.

 

Glad you got it taken care of! I left you a message at seemingly about the time of your update here. Today was sort of crazy - apologies for the delayed callback!

 

Glad to hear you got it fixed! That's awesome

 

No worries Ed .... Thanks for the reply.

Thanks to Jlillie as well !