MSPNP MSPNP specific Megasquirt related discussion.
Sponsored by:
Sponsored by:

Wideband and MS2 Reading Different AFRs?

 
Old 02-19-2018, 06:03 PM
  #1  
Pav
Newb
Thread Starter
 
Join Date: Jun 2017
Posts: 7
Total Cats: 0
Default Wideband and MS2 Reading Different AFRs?

hey all

I just finally got my MS2 installed on my 95 Miata, i was playing with it in tunerstudio to learn to tune and i noticed that the AFR on my wideband is different from the AFR displayed in Tunerstudio(10.8 on windeband and 12ish on tunerstudio). has anyone encountered this before? im running a bran new innovate mtx l plus, MS2PNP, and the GM AIT. other then that the car is currently stock. I'm just trying to figure out the MS before I order a turbo.

second question, All the research and videos ive watched have been on a 1.6. I noticed on the 1.8 i have tube comming off the intake just before the throttle body, going into what looks like a valve or sensor.(in pic below) my question is what is it? what issues will i encounter when i turbo? can i delete it or do i have to add a bung to the intake tubing to keep it?


thanks


Last edited by Pav; 02-19-2018 at 06:20 PM.
Pav is offline  
Old 02-19-2018, 06:24 PM
  #2  
Senior Member
iTrader: (1)
 
Join Date: Dec 2010
Location: Farmington Hills, MI
Posts: 1,146
Total Cats: 152
Default

Is the Wideband grounded at the same spot as the ECU? Grounding offsets are often the cause of mismatched signals. First step is to try to get a clean ground, then next step is to recalibrate the sensor in TunerStudio to account for the grounding offset.

That's the idle air control valve. Put a bung on the turbo piping.
acedeuce802 is offline  
Old 02-19-2018, 07:07 PM
  #3  
Pav
Newb
Thread Starter
 
Join Date: Jun 2017
Posts: 7
Total Cats: 0
Default

Thanks!!! The wideband is grounded off the engine ground beside the intake manifold, which from what i remember reading was recommend, now, i did share the ground with the boost gauge, would the cause any issues? as for the ECU, its using whatever ground is in the factory wiring.. i will have to find a wiring diagram to find out for sure where its grounded to.
Pav is offline  
 
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
ravinaziankid
MEGAsquirt
3
05-23-2017 02:59 PM
pangster
MEGAsquirt
8
09-05-2016 01:46 PM
Twodoor
MEGAsquirt
12
06-08-2014 11:11 PM
carnut169
Engine Performance
13
05-03-2012 12:10 PM
Cross
MEGAsquirt
18
12-11-2010 10:44 PM


Thread Tools
Search this Thread
Quick Reply: Wideband and MS2 Reading Different AFRs?


Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.