Heya fellas. Just to get this out of the way, it's a '92 7.3L N/A, E4OD, the IP is from R&D, injectors are 7x R&D and 1x NAPA reman, IP and sticks have about 25k miles on them. And as a little more background, my truck rolls black smoke @ sea level and I don't have a pyro. Yes I'm doing it wrong So anyways, I've got an interesting one. Last week I took the truck on a road trip to Reno, NV, which is about 4500 feet above sea level. On the way there the altitude peaked at about 7000 feet. My truck did NOT like that elevation one bit, just the tiniest bit of throttle and the skies turned black, but it smokes bad enough at sea level so I kinda expected that. While I was in Reno though, the truck started puffing thin white smoke out the tailpipe, but only while the truck was sitting in gear and not moving. Put it in neutral / park, or give it a bit of throttle, and the white smoke cleared up. I chalked that up to the engine not liking the altitude. However, now it's doing that here at sea level, too, so I must've done something to hurt it. It doesn't do it while the engine is cold, only when it's warmed up and sitting in gear. It's not a solid stream of white smoke like an injector that's hanging open, it's just puffing like it's maybe just one cylinder acting up. I don't hear the dreaded exhaust chuff, no new ticks, it doesn't appear to be misfiring, no bubbles in the coolant overflow jug, and the exhaust doesn't smell like coolant or raw diesel. Any thoughts on this? I'm sure my EGT's were way too high on the way to Reno, though I didn't smell the oil cooking off the exhaust manifold like I normally do when the EGT's are high. I'm thinking I pissed off an injector somehow, I've got a set of new Stanadyne's sitting on the shelf but I don't want to start swapping parts out before I get some input first. Thanks!