I have a hesitation or almost like a defueling issue between 27 and 2800rpm; what my truck does is it pulls exceptionally hard up to 2700rpm range than it feels like it defuels and than picks back up again, rail pressure stays solid right at 22500psi so I am pretty sure my fass is keeping up, boost holds at about 50psi. So what do you guy's think can a map sensor be the culprit?? Thanks for any help, Mike