Alright guys, I recently swapped my b18c GSR motor from my eg si hatchback into my 90 si hatchback. I did the obd 1 conversion and everything is wired right. The engine is running off of the same ecu that ran it in my EG and the same tune. The only problem is that the car will run fine and idle fine (hovers around 14.7 AFR) except in WOT. It used to go to 13.0 afr under WOT but now it goes to 12.0 and when it hits VTEC it goes to 10.0. What the hell could it be?? I changed the fuel filter, injectors are firing, pulled the plugs and they are brown, Cam timing is dead, and fuel pressure is the same as it was in the EG (37atmos, 45 wot). PLEASE HELP!!!!!!!!!!!!!!!!!! This s^$& is driving me crazy!

 

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