Injector not firing

[rthammer]

Hello,
This is only my second post, I got in trouble for my first.

I received my TS chip on Monday. I originally purchased it from TDP. I bought it when I converted my split injectors to single shots. I have had trouble with the truck smoking when I start it up. It smokes like crazy until normal operating temps, or if I head down the road, it stops after the first quarter mile or so.

Local diesel shop tested and said number 7 injector wasn't firing upon startup.

I talked to Jim from Rosewood, whom I bought my injectors from, and he said all his warranty work is single shot conversions. He offered to replace the injector, but said a good tuner should be able to fix it. So I sent my chip to PHP after getting no response to my emails @ TDP.

Well, after retune, injector is still not firing when cold, smokes like crazy.

Was Jim Rosewood right?
Did I just waste $300 retuning?
What should I do next?

My truck is a 2002 Econoline Superduty Extended with 174K.