Base JDM K20A PO171

[bryanbear69]

i HAVE TRIED EVERYTHING. I even took it to two mechanics. The catalytic was replace early on when i got a p0420 code. Got two new oxygen sensors. No leaks anywhere on the engine bay. Fuels pressure is awesome. Idk what else to do. Please help!

[feralcomp]

1. How did you check to verify that there are no air leaks?
2. Are you able to monitor your fuel pressure at load or only at idle?