N54Tech.com - International Turbo Racing Discussion
matt------ matt------ is offline
New Member
Posts: 1
Join Date: Feb 2020
Car: 340i
Default 340i mppsk JB4 AFR Concern - 02-10-2020, 12:09 PM


New to the forum and JB4 which was installed on Sunday.

Car: 2016 340i B58 with mppsk fitted

Question: i have noticed the AFR going really high / low in a short period of time. It can go from circa 15 to 25 down to 1 then back up high within seconds. Under power it is consistent at around 15.

I have attached two logs to show this.

This happens only when coasting without apply any power or after a short blip of the accelerator. Car appears to be running without any issues.

I have done lots of searching and looking at other logs and cant see this discussed by others.

Any ideas why it would be jumping around so much and if this is an issue or normal.

Many Thanks,
Attached Files
File Type: csv 2020-02-10 08_48_20_Map-2.csv (59.4 KB, 58 views)
File Type: csv 2020-02-10 17_35_28_Map-0.csv (56.2 KB, 49 views)

Last edited by matt------; 02-10-2020 at 12:24 PM..
Reply With Quote
B58_M240 B58_M240 is offline
Junior Member
Posts: 39
Join Date: Dec 2018
Car: M240i
Default 02-11-2020, 06:54 AM

Looks normal to me. I can't say I've logged at idle, but I have definitely seen gauges bounce around at idle and especially when coasting in neutral [manual trans]
Reply With Quote

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
Thread Tools Search this Thread
Search this Thread:

Advanced Search
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

vBulletin Skin developed by: vBStyles.com
Copyright 2007 - 2020, N54tech.com