the code i get is a p2716. ive tried searching for it with no luck. all i can find out is that its a pressure solinoid d. i cant figure out where that is or what it is or if that could cause a no start.

the truck has had missing issues until warm up since i bought it. last week i did an oil change and added 2 cans of seafoam to the oil and 1 to the fuel to see if it would help. nada. infact it got worse right off the bat. i added some fuel at the same time and drained the seperator. so for the last week its been much longer starts, long starts when warm which had never happened before and still missing some even after warm up. so i was trying to run out that tank of fuel in case that was it and if not then drain the oil. well today when i tried to leave work it started but missing real bad like only running on half of the cylinders for about 20 seconds then died. now it will start but die imdeatly. like less than 1 sec. towed it home drained a refilled oil and drained fuel seporator. but still the same. im getting low ficm voltages but batteries are strained which in this truck has been the norm. ficm volts go to where they are supposed to be after alt kicks in. icp pressure is way off too like it takes a sec to reah over 500 truck starts then it imidatly goes to 1800+ and truck dies.

 

 

thanks, do you think that could cause a no start, or in my case a start the die?
im gonna go out now and pull the icp sensor and see if it will start

 

Only if it is doing something electrical. I hate electrical problems. Not sure what circuit it is on. Worth trying w/ the ICP unplug.

 

sounds Like Multiple problems to me

1 being the Batterys

2 Possible IPR since when it starts it Surges then Dies but could easly be ICP sensor to

do you have an OEM OIL Filter and Cap???

 

i just tried to dissconnect the icp but batteries are to dead to turn over, so i will leave on trickle overnight and try tommorow.

yes cap and filter are oem
where is and what is ipr and how do you check?
batteries and alt are 6 months old, but i was planning on replaceing soon anyway, may do that tommorow after work

 

ok i added ipr to my scangage and i got it to turn over for a few seconds it read 77.6

 

Program SGII for

ICP
ICPV

then post all 3 at KOEO and crank

I assume it has a HPO leak

 

now i have a p2617 code crankshaft sensor. going out to change batteries and alt. will post more with sgII readings after

 

i think that code was a fluke from low voltage just like the tranny one earlier.

i swapped the batteries and alt. one battery was dead completely the other tested at 60%. the alt also tested bad. all three are less than a year old.

new batteries were not charged 100% so i have them on trickle charge over night but i ran some tests anyway. heres what i got

koeo | crank
fsn 0 | 1
cvi 5 | 5
fmp 48 | starts at 48 drops to 44 by the time it should have started goes as low as 37 after several seconds of cranking at about 15 to 20 seconds it drops as low as 25 and dtc fault appears in dash but no codes found

vlt 12.1 | 10.8
flp 12.0 | 10.5
fvp 12.0 | 10.5
rpm 0 | 169
icp 10 | 1257
ipr 14.4 | 76-38
icv 0.24 | 1.45

i know ficm volts are low but thats how the truck has been since i got it a year ago. it will drop to about 45-39 upon cranking depending on how long it takes to start then it will go back to 46-47 till alt starts charging then stay between 48-46 while running. ive never seen it drop as low as it is now but ive also never cranked on it this much and for as long before

im guessing everyone is gonna say ficm is bad but i have no money to throw at this truck i have to be 100% sure before i can shell out that kinda cash. is there anyone in the new orleans area than may have a spare i can borrow to see if it starts?

we have a broken down f-550 at work with a 6.0 in it. i think its an 05 if i pull the ficm from it and all the voltages look good it should work in my truck with out a re flash right?

 

YUP. Assuming the FICM from the F-550 truck is a known good FICM, swapping it into your truck can't hurt.

And yes, it IS the FICM that is causing your issue.

 

The 05 FICM will work without a re-flash.

With the voltages you report, the FICM is bad, no reason to wonder about that.

edit - too slow!

 

ok thanks

does everything else look good?

im not sure about that ficm the truck doesnt run and batteries are done for

we do have another f-550 that runs sometimes maybe i could grab that one to test

 

You better check the Grounds and clean them wherre they mount on the Frame and engine

your Charging system Killed the FICM AS Mike //Mark Mentioned

 

You do know that some folks believe that running with a bad FICM can accelerate injector failure (very expensive) don't you?