spools420a

Hey all I finished up a 2871r/550cc/z32 maf/enthalpy ecu/

The car runs great till It goes into boost then it just cuts off and bucks real hard.First thought was boost leak,tested and holds pressure great.It was running great before the 2871r swap so it must be somthing in the area.

the first day my afr at idle were normalish around 14ish yet today they are extremely lean at idle at 17 afr.

My prime suspect is MAF wiring at this point.Zilvia is allowing attachments so ill have to send links and explain

testing the maf with car running and backprobing the (B) 0.5v signal i get 1.40v and more as rpm climbs,(c) is on chassis ground and tested good for continuity, (D) is ecu ground and also has good continuity.(e) has battery voltage tested good.



heres the wiring diagram I followed.(if link doesnt work its the JWT sr20det to z32 maf wiring diagram.

https://imgv2-2-f.scribdassets.com/i...5C%5C%5Cu003d1



The only difference is (b) is chassis ground,I will combine (B) and (C) today to ECU ground and see if that does it.along with voltage drop testing the ground wire

I'm sure someone here has had this issue so please let me know your opinions.

again car ran fine before installing 2871r/z32 maf/550cc/enthalpy.