Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

Go Back   Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum > General > Tech Talk

Tech Talk Technical Discussion About The Nissan 240SX and Nissan Z Cars


 
 
Thread Tools Display Modes
Prev Previous Post   Next Post Next
Old 07-16-2021, 09:17 AM   #1
spools420a
Zilvia Junkie
 
spools420a's Avatar
 
Join Date: Dec 2009
Location: phoenix az
Age: 39
Posts: 422
Trader Rating: (1)
spools420a is a well-known jackass
Feedback Score: 1 reviews
bucking when going into boost

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.
spools420a is offline   Reply With Quote
Sponsored Links
 

Bookmarks


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -6. The time now is 10:30 PM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2021, vBulletin Solutions Inc.
vB.Sponsors
Copyright © 1998 - 2019, Zilvia.net™