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Hello guys, I have civic 98 coupe with d15z7 motor and automatic trany with a p2p ECU it works like shit and only 1 stage vtec is working the fuel is always too rich and if the vtec opened on the third gear the check engine light is on and won't rev above 5000 rpm and vtec is completely off....SO I bought p2j-j71 ECU cause I thought it is the right one plugged it but the car doesn't even start
Is there is something to do before I plug the new ecu
 

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have you checked the timing?
 
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