Quote:
Originally Posted by ticopowell
The difference between the flex and the not so flex is the gaskets and rubberized material is made to better withstand the ethanol. There might be a few other small differences but that is the biggest as far as I know
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^^^ What he said ^^^ (That's my understanding, anyway.)
NITEMARE - I can't really think of anything you can do to fix the problem you're having. It sounds to me maybe like the A/F ratio isn't quite right at that no load condition (possibly too lean) and when you open the throttle, it (maybe) becomes richer.
I'd have to say Bill is going to have to adjust your tunes, so you'll need to get in touch with him. (And I know that's sometimes difficult.)
- Jack