6.0 missing - Replaced EGR Valve, problem exists...HELP!
2003 Excursion – 6.0L – 88k Miles – RBP 4” exhaust – AirRaid Intake – 8” lift – 38” tires – Ford Cetane additive
CLIMATE: The truck is in Phoenix, AZ, it’s cold now, 40 degree lows at night, if that.
At various times over the past year (11/08, 1/09, 7/09 & 10/09) I’ve had the “missing”, “sputtering” or “popping” problem. From 1750 to 2250 RPMS, when applying throttle, my truck misses and pops, big loss of power and I can smell unburnt diesel fuel. When this “missing” happens, I see black smoke coming from the exhaust. The turbo seems to wind up and down as well, like a low wine to high wine and back to a low wine, like it’s not getting enough air to properly operate. I cleaned the EGR valve a few times and the problem went away.
The past month, the problem continued and I cleaned the EGR valve, problem remained. I sucked it up and bought a new EGR Valve, the problem went away for three weeks. The past two days, the problem continues, however, not as bad as when I had the old EGR valve.
There are no engine lights or warnings when this happens. The truck starts fine. The problem sometimes happens when I begin driving or it starts after I’ve been driving awhile, it’s hit or miss.
I plan on resetting the computer in the morning, pulling the battery leads, and see if the problem reoccurs. If it doesn’t, I’m wondering if I have bad FCIM? Maybe I have some bad fuel injectors? I’m at a loss and very frustrated. I enjoy working on my own vehicle and this being my first diesel, I’m still a noob. There are quite a few diesel shops here in the valley, but If I can nip this in the bud myself, I’d be thrilled.
If you have any ideas or thoughts on what I can check/replace/repair/etc., I’m all ears. Thanks in advance for any help.