i have a 97 civic cx. put a swap with a b16a2 and i used a 97 gsr engine harness and ecu. after the swapped runned the car. CEL went on and giving me this code.

P0450 EVAP MALFUNCTION
P0453 EVAP EMISSION CONTROL PRESSURE SENSOR HIGH INPUT
O0420 CAT SYSTEM EFFICIENCY

pulled the back up fuse under the hood to reset the light same code popping up..
NEED HELP!!!!

 

Well for one thing, a GS-R ECU will not work correctly with a B16 engine because there is no IAB system that the GS-R intake manifold has. As a result, the VTEC crossover point is too low for the B16, and I'm sure the fuel maps are all wrong, too.

Do you have everything hooked up correctly to the charcoal canister?

 

yes i had someone rewire the gsr harness. i still have my old charcoal canister hooked up in the car... the vtec work properly too... i had some1 check my wiring harness and he said everything okay.. i dont know why this code keep coming back... is there anyway to solve this problem?? any suggestion??