Aight. i got 94 civ'y hatch. jdmd15b vtec.Im running stock p28 computer and i took the wiring harness from the same car i took the ecu from. 94 honda civic ex. Vtec was working till i swapped out the wiring harness.the kid before me wired in the vtec from the vtec solenoid and stuff strait to the plug for the ecu.and i left all that hooked up and swapped in the ex harness for the 4 wire o2 sensor. i dont have any codes. like 4200 no vtec. please help! my cars slow as **** with out it! and any links for performance parts for theses motors? thanks!