Getting batteries replaced today. Found one bad for sure. I've already replaced icon and the fittings in the oil rail. I'm positive its the weak batteries and possibly the ficm. Hope its fixed today.

 

Weak battery's can kill ficms

Sent with a Droid RAZR in one hand and 14,000 volts in the other.

 

Hopefully mines not dead or weaken at all. I think ficm is $800 plus the $240 for batteries. Might as well call it a b.o.a.t. break out anorher thousand.

 

Nope, you can get them repaired for FAR less money bud! Batteries will be more expensive than a FICM repair. Glad you joined the forum yet?

 

I think FICM's should never fall below 46 volts or something like that and yes, diesel engines run mainly off of compression and without the power from those two big batteries to turn that starter motor fast enough, you'll be a duck in the grass.. OR a duck in the water... (that doesn't sound right?)

You'll be stuck... Yeah, that sounds better.

 

The batteries run the FICM though, a TON of power is drained through that when you turn the key, listen closely and you'll hear it buzzing all 8 injectors, plus running the glow plugs, plus cranking the motor... it all adds up. However, even if your batteries are good enough to light the motor, a slightly weak battery will cause the FICM to not function properly, which causes poor fuel burn and delayed timing a bit. Makes it run like poo.

 

AGREED

 

well is it fixed?

 

Ford sells both batteries for roughly $165 for both. I picked mine of at the local dealership for about that.
And Ficm repairs are alot cheaper. There is also an option for $500 that lets you replace the bottom half of the FICM for a do it yourself repair. Ill have to find the website for that in my last issue of Diesel Power Mag.

 

The 1/2 shell can be gotten from Ford, or International, International is WAY cheaper. However, that can only be done on a 4 pin FICM. No 1/2 shells for 7 pins.