[TheVinylKingz]

Hello, I?ve been trying to diagnose my SR20DET (red top) but unfortunately I have not found the issue. What going on is that it cranks at cold starts, but when it hits operating temperature (my assumption) it starts to loose power. I feel it?s misfiring. The weird thing is that before hitting operating temperatures it boosts really good and it is very responsive. Prior to this problem I used to drive it with no problems. It all started when I was driving back home from work when all of the sudden I felt the car change its feel and drivability. Almost like it was on 3 cylinders. But till this day I haven?t had any luck changing parts and spending money to determine the problem. I seriously need help with this SR20det.

Mods:
Compression 180ish on all 4 cylinders
Rebuilt SR20det (red top)
Stock ECU 62 ( code 55 nothing is logged in the ECU when this issue happens)
86.5 pistons
T28 specR
Tomei PonCams
SR Stock MAF
87mm head gasket
Side Mount Intercooler
Stock 370 injectors
Walbro fuel pump

Sensors: coolant temp changed (same problem)
Spark plugs gone back and forth with heat range of 6 and 7 (same problem)
Coilpacks changed including igniter (nothings changed)
Swapped 370cc injectors for other ones to test out, same problem.
O2 sensor ( used fat one to see if anything changes, same shit)
Ka24e (single cam) MAF (still the same problem)
TPS reading at .48 and 4.19 at WOT