Ok heres the deal, we just slapped a SOHC zc in my buddies 9g hatch. Its all in wired and running but like shit. Itso n a pg7 i think now. The car wont run on the fireing oder thats in the book, do ZC's have a different order then the D series si? It runs on some misc oder but shity. Theres spark and all the cyclnders are fireing. Im thinking maybe a skipped cam tooth? It back fires from the intake a lil witch means left open intake valves so explains it explains lil but with the shit firing rder porblems i cant be sure, also it way under power and stumbles along with crapping out when you stomp on it fast. I didnt wire the engine because i was no there to do so. Is there anything when preforming the ZC swap along with MPFI that would make the car act like this? What should i look for first? My main thing is geting the fireing order right, if the book is worng then whats the correct way? The cars has codes 4 10 and 14 Though i just hhope his dumb ass read them correctly. Ps. were having garage mechanic wars over here, please let me know what i can do to help give you guys a better idea of what the problem is so you can help me fix this. If i do im the man. LOL im in like compatition with are other local buddie for garage work.