This is a long one but I could really use the help if you can stick with me.
New to me 2006 f250 6.0. 230k miles. Blowing white smoke at startup, worse when on throttle. Already EGR
deleted, no loss of coolant in the degas, and no increase in pressure with a pressure gauge tee'd into to the degas bottle (max 10psi when going up a long hill). No puking coolant. Smoke smells to me like fuel. I don't think it's a headgasket - coolant isn't getting pressurized, and I did a relative compression test with similar cranking speed all cylinders. No DTCs. Passes KOEO
test without codes. FICM
voltage at idle ~49V, syncs as well. Coolant temp within 10deg of oil temp. Fuel pressure checked with a manual gauge, 50+ psi
I think it normally would be an injector.
But, 1500 miles ago, before I got the truck it had a new HPOP
, fuel manifolds, dummy plugs, 8 injectors, oil cooler all from ford, to the tune of $10k ($$$). Ford injectors too. Was running well for 1500miles then started blowing the white smoke. Was parked after, sat for a year, then I picked it up.
Changed the fuel filter(s), drained oil fuel and put in fresh fuel. Old fuel was farm fuel (red). No change.
OK, so maybe one of the injectors were bad due to poor install. But it ran well for 1500 miles? I do a cylinder contribution test (granted, this is from a snap on scanner not IDS) and I'm having trouble interpreting the results.
The snap on one does the contribution test without compensation. I have negative values into the 30-40's for more than half of the injectors. 3 on passenger side bank (1,3,7) and two on drivers (2,8). That's idle. When I give it gas, everything goes to zero - maybe that's a snap on software fault. So when you see the graph goes to zero - it's when I'm giving it a bit of throttle.
Being that it is so many injectors, I felt like it may have something to do with either the fuel or high pressure oil. Also, it isn't consistent - sometimes the cylinders are misfiring - other times not. The only real consistent bad players are cyl 1 and 2.
Which makes me think more towards fuel if it is always cyl 1 and 2 but sometimes others? I changed the fuel and filters to do the best I could if this was contamination or water in fuel.
Random other things:
engine off, EBP
reads 15.9psi whereas MAP
, MGP, BARO
all coorelate and make sense (MAP
= MGP + BARO
When running, IAT
= 30's, IAT2 (intake manifold) = 60's.
Any help making sense of this would be greatly appreciated.