I am in the process of trying out a 2000 f250 with 83k miles on it. The vehicle had some exhaust leaks, so they had the tech put in new up pipes and donuts to go with it. They thought the no power situation was coming from the bad leaks. Well the leaks are gone and it still HAS NO POWER!!! When you romp on it all it does is smoke black and very slowly pickup in speed. No Check engine light, no turbo whistle. it idles, starts, drives awesome cruising down the road with the cruist set on flat ground.
Read on here to check the normal things like IC couplers and all that and everything is good. Waste gate functioned when i put a handheld vaccum pump on it.

Any advice on what it could be?? This pickup is super clean and i can get it for a heck of a deal. But i dont want to purchase a money pit either and have a headache from the gf nagging at me that will never go away.