2003 6.0L - runs rough on cold start

joshbuys · December 18, 2012

Ok, this is all second hand info as I have not looked at the truck myself, it's at another shop that calls me from time to time for help,

2003 6.0L, all 8 injectors replaced about 10 months ago, has been fine up until a week ago when it died, then it would start and die, FICM voltage was low so they put in a FICM, now it runs, but it had a miss, 2 and 7 were contributing low and the fuel pressure was low, they replaced HFCM, Fuel Pressure Regulator - 9T517 - and injectors 2 and 7, now it runs smooth hot, but injectors 2 and 7 are contributing low, he says the negatives seem to jump from injector to injector(going to all 8 injectors), but seem to hit 2 and 7 more often than the others, once it has run for 5 - 10 minutes it seems fine.

I'm going to take a look at it tonight or tomorrow night, I told them to check for exhaust gasses in the fuel (although I would expect this to be more consistent, and get worse when it's hot), check the cam/crank sensors...looking for any other ideas as I have to drive a ways to get there and would like to be able to check everything in one trip.

Thanks in advance for the help!