2005 6.0L- Hesitation and Black Smoke?
I went and test drove a 05 F250 today with the 6.0L and the truck ran pretty good except for one issue. If you get it part throttle, say like 1/2-3/4 of the throttle, and did it just right, the truck would hesitate pretty bad and if you left off and got back on it, it'd come back to life with a big puff of black smoke. While it hesistates, there is a little bit of smoke steadily coming out before the puff. It's a completely stock SCLB XL 2WD with roughly 190k miles or so. I like the truck and was looking at trading my 05 SRT4 for it but this issue has me worried for obvious reasons. From what I'm seeing online, it could be the EGR valve or the Turbo Vanes sticking. Is there a sure way to find out if it's either one without tearing into it? I forgot about the stock boost gauge during this hesitation so I'm not sure if I could have learned some from that but I'm not sure what to do. Neither the turbo vanes or the EGR seem to be hard or that expensive (assuming that the turbo doesn't have to be replaced), but could it be something else more major? I seemed to find something that blamed the EGR cooler/ Oil cooler for the issue but I can't remember if it was directly connected or just something he found out as he was replacing the EGR valve. Would a Ford dealer charge an arm and a leg just to take a look at it? I wouldn't mind spending an hour's labor to let them look at it, but I'm not sure it would be worth it if it's just going to be either the EGR or the vanes.
Thanks for the help guys,