LLY: fuel pressure going crazy

[05greendmax]

i have efi live and i just had my truck loged to day, and my fuel pressure is way out of control,,, up down up down on a wot run. and i have a ad2 on it so i thought it would not do this whats wrong
please help its way to high at points and then the line drops big then come back up what is causeing this

 

[GMC_2002_Dmax]

Start with the tune ??

Go back to a stock tune or work your way up through from the smallest to biggest.

Could be something not right somewhere, or a fuel filter issue??

Good Luck.

 

[SgtKilroy]

Bottle test? See if your FPRV is worn out?

 

[catmenace]

Mine is doing the same. Changed the FPR in the stock position and did not help. EFI tuning is being worked on right now. Mine is also only happening at WOT.

 

[05greendmax]

im thinking its my fpr