Quote:
Originally Posted by JackandJanet
Robby - As I see it, there are SO many ways the mechanic could have screwed up something when he did your swap. Personally, I would NOT be trying to put a "tune" on it until you get it running properly at stock. You don't need the confusion that interaction of variables from multiple different sources is going to cause.
Try to eliminate as many variables as possible. Take one thing at a time and fix it. Once the truck acts properly under all driving conditions, then, consider adding the complication of a tune. The tune will not fix some underlying problem in the basic setup.
- Jack
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There have been 2 good mechanics tell me that since these transmissions are electronically controlled that the issue could be in the tune. Since Bill wrote the stock tune for the truck to be a 5.4, could it be possible that something in the tune could be off? Maybe a difference in the 4r70w vs 4r100 part of the tune?