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I bought a Civic 98 with a acura integra 2000 (b18b) turbo with a t3/t4 it have a P06 ecu Obd2 convesion to a obd1. The car was running good until the turbo manifold crack. So i change it for a tubular turbo manifold. Since then on Idle i'm running rich on idle and when i drove for maybe 15 min and i stop pressing the throttle it's smoke a lot and stop and it will re-do it again. I check My compression is good, My 02 sensor have been changed.

So the thing is i don't know what my problem and i don't know what is my ecu reflash.

Is anyone can help me or guide me?

*i dont know if this can help. When i put the key on ignition it flash two time and when I press on the pedal to the flow the check engine light appears. My friend with his ecu-tune he can reset his 02 when pressing the gas and after the brake.