Unfortunately I have been recently dealing with a WOT issue. Under WOT the engine feels like it is choking or buckling. The first time it happened it felt like I hit something it was so abrupt. It usually hits around 5-6k rpm. It has only pulled a P0087 code twice, but it is very rare and will almost never pop a code after I clear it. I am getting some negative corrections under load so something is going on.
I replaced, the HPFP, LPFP, OEM. both their sensors, fuel tappet, ignition coils, spark plugs multiple times (NGK gapped .026-.024), checked hoses, replaced the induction tube and intake to higher flow options from whoosh. Still no dice.
Low side pressure/voltage seems consistent. FRP is showing some dipping on logs, but not always consistent with every hesitation I log. Sometimes I'll get the hesitation with no dip. I have no other symptoms with normal driving until I get on it (I can put my foot down up to 80-85% and have no issues).
I'm on a stage3 93 tune with an S280 Turbotechnics turbo. If I go back to stock tune the issue is still there, but I can usually get through most of the rev range and its a little harder to replicate every time.
I did get my timing belt done recently, but haven't had any other codes or issues to think the timing would be off. I am tuned and have been talking with my tuner as well trying to find the issue. Shop is a bit of a drive to get to, but it might be my next option to have him look at it.
Has anybody else experienced this before?
https://datazap.me/u/streetwolf/projects/cmonhqxyx0005jz06ylsoij4s
https://datazap.me/u/streetwolf/projects/cmoknqh580005l506es7rrgfh-Stage 0
https://datazap.me/u/streetwolf/projects/cmnnvv4wm0003l206pdb34mnm