might be out of adjustment. You can slot the holes and rotate the TPS
to adjust it, just do a quick search and you will see several guys have done it. It just involves a dremel tool (or something similar) and a multimeter to check voltage at the sensor. Took me about 15 minutes to do mine. Shift points could be thrown off with an out of adjustment sensor. Also, what brand TPS
did you put in? Guys will tell you to ATLEAST buy a quality one, if not Motorcraft everytime. Other/cheaper sensors do not perform and the computer will freak out if it isn't getting a perfect signal.
You could also have some big exhaust leaks, and some boost leaks on top of that. Check the pre-turbo exhaust for any leaks, you'll see soot anywhere it leaks.
To check post turbo, intake leaks, you will need to create a boost-leak detector. Again, a quick search will come up with lots of guys on how they made one, or some places make and sell them, if you dont want to make one.
Report back with your findings.
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1996 Cali F350 CCFB, 7.3 PSD, 2wd SAS, w/ 380,000 miles.
New Motor at 352,000, DieselSite Legendary Trans at 356,000 and many more