Originally Posted by
Seishuku
LP fuel pressure sensors on these engines don't have the greatest reliability record, I'm on my 3rd right now... Though replacing the 2nd one may not have been needed, but they're cheap.
Don't really think that's the issue here though.
Best bet would be to jump back to a known good tune (previous version or even 100% stock), reset all adaptations and let things re-learn and see where it settles.
If it still does it, then it has to be something mechanically wrong.
It's really recommended that a reset be done after each flash, but personally I'm too lazy to do a full re-learn with setting readiness and don't want to waste the fuel. lol