my mx3 is cursed

[mazdachad]

Still working on the bpt swapped v6 mx3 and just cant diagnose the problem. It idles decent but when you give it any gas at all it hesitates then accelerates decently but the second you let of the gas the rpm's shoot down and kill the engine or nearly kill it. Checked fuel pressure and the pump its fine. Fuel pressure regulator is good. Tps is working. Injectors working. Any idea. Im using the bp26 ecu and pro lx harness. any help would be appreciated im getting desperate.

[mazdachad]

anyone have any ideas?

[FazdaBoy4ever]

vacuum leak?

[tehstocker99]

how comfortable are you w/ all the wireing/hoses and all? did you use old hoses? is the car throwing any codes? maybe take to a "pro" mechanic and get him to test drive it

[Chad]

idk much about the whole bpt thing but i know that seems like if u had a bp it would be a leak in the intake .. so i would check to make sure all your connections are solid..