Hard start and no low end power.

taterthedog · Feb 25, 2013

My buddy has an 05 250. 6.0. It's very hard to start. Once running it has no low end at all but will make power at the top end. EGR valve is new, fuel filters new. Fuel pressure at 50 psi. Idles rough but power balance on AE is good. Any advice? We have to start it on ether and then after a while it will stay running without the pedal.

taterthedog · Feb 26, 2013

Should also add that the cat is gutted too.

POWER-STRUCK · Feb 26, 2013

check ficm voltage

taterthedog · Feb 26, 2013

POWER-STRUCK said:
check ficm voltage

Which ones? I can't remember what ones there are. Vpwr, mpwr, etc. it did have some codes in memory for injector electrical faults.

CCRICE · Feb 26, 2013

The screw to the far left as you are facing the drivers side of the truck. DO NOT let the red lead on the multimeter touch the casing of the ficm as you can short the whole thing out.

POWER-STRUCK · Feb 26, 2013

i think it is m power but just pull up v,m,l and watch em 2 of them should be battery voltage and the other 48v
http://alliantpower.com/sites/allia...dia/technical-bulletin/2012/aptb_06-12_en.pdf

POWER-STRUCK · Feb 26, 2013

check this out also
http://www.motorcraftservice.com/vdirs/vehicles/diesel/schematics/05_Diesel_sheet.pdf

kingranchstroker · Feb 26, 2013

Make sure your getting 500 psi oil pressure to fire the injectors while cranking and ohm the glow plugs to see if there are any bad ones.

taterthedog · Feb 26, 2013

Thanks for the info. I'll check it out on days off. I appreciate it.

taterthedog · Feb 26, 2013

kingranchstroker said:
Make sure your getting 500 psi oil pressure to fire the injectors while cranking and ohm the glow plugs to see if there are any bad ones.

ICP was good. Haven't checked the glow plugs but it doesn't seem like a glow plug issue.

CCRICE · Feb 26, 2013

I could have swore it was the far left screw.. That's the one I tested on mine and got 47-48vlts on.. I could be mistaken though..

taterthedog · Mar 11, 2013

He measured voltage and got 19v.

Mdub707 · Mar 11, 2013

4 pin FICM's you should be testing the pin closest to the drivers side, on 7 pins, the row with 4 screws in it, check the one closest to the passenger side.

19 is terrible, get it repaired.

03stroker · Mar 14, 2013

I would say check ficm and try starting it with the egr valve unplugged ..I put a new egr valve in mine b4 I deleted it and the egr valve went bad in a few weeks

03stroker · Mar 14, 2013

O ya 19v on ficm..bad ficm! Get the bpd 58v ficm...there awsome!

taterthedog · May 1, 2013

Bumping this up. Just put in a FICM half from bpd. Set it up for 48v. Now it has good voltage koeo. However still runs the same. Could the previous low voltage have damaged the injectors?

amarillo250 · May 1, 2013

Do you have a chance to check the HPOP?

taterthedog · May 2, 2013

ICP comes up nice and fast when starting.

Lassie · May 2, 2013

With voltage reading that low...yes, injector coils could now be bad.

A coil uses the same amount of power to operate, no matter what (unless bad). I don't know the actual coil ratings, but assume the injector uses a 100W coil. With DC, Power = current *voltage. At 48 volts, coil would pull 2.08 Amps. At 19 volts, coil would pull 5.2 Amps.

Current is what kills, so when voltage drops, things tend to fry. And the longer it's ran that way, the more things that get fried.

Mdub707 · May 2, 2013

Are you POSITIVE your FICM plugs are seated well, I've had the same issue on a repair unit I was testing, tested at 48+V across the board but truck started and idled like garbage. Went to remove the FICM and the middle plug slid off on it... wasn't seated properly.