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Message: [QUOTE="JD3020, post: 1442693, member: 373"] Background on my truck, 01 F-450 with 299k miles. I replaced the engine winter of 2014 with one i pulled out of a buddies truck. BUT it wasn't the original engine in his truck either, it came out of an 01 school bus with 140k miles. He put about 15k miles on it before he totaled his truck and i got the engine. I've put 20k more on it so far. So we think it has 180-190k miles, but nobody knows. Its never really ran "right" since i put it in my truck, not that its ran bad, just seemed a little down on power and harder to start than it should. But my OBS hasn't had stock injectors in it since 2010 so i'm not really familiar with what a stock 7.3 is like. This winter i've been noticing an issue that seems to slowly be getting worse. Truck hates cold starts, i know the GP's are good and it turns over fine, but takes it a while to fire. Blows a puff of white smoke and then light haze till it starts to warm up, normal for a 7.3. But it runs rougher than ****, and has no power, like its down a couple cylinders. Being a manual you can really feel it once you start to let out on the clutch, even in low or first gear. The first day it got really bad i basically had to limp this thing a couple miles up the road till i got on a state route and had to bang some gears to beat traffic. As soon as it clicked over 2k RPM's it came to life and was good to go. Ever since then i've been revving the engine past 2k before i leave the driveway and its fine the rest of the day. So is this stiction that i'm getting due to higher miles on the injectors? I've always ran conventional 15-40 oil in it, 3-4k mile OCI's, and the truck rarely runs below 40* so its not like i'm battling cold temps. [/QUOTE]