map sensor tied to 02 readings on jimstim

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jrmfabrication
MS/Extra Newbie
Posts: 3
Joined: Tue Apr 12, 2016 10:15 am

map sensor tied to 02 readings on jimstim

Post by jrmfabrication »

hello I have a ms2 v3.0 .when testing on the jimstim v1.5 everything works normal but the 02 sensor is tied into map sensor readings . I am running the latest 3.4.1 firmware . I have built a few other ecus and never had this issue so not sure where to look to resolve this .

thanks
Jake
Matt Cramer
Super MS/Extra'er
Posts: 17499
Joined: Thu Apr 16, 2009 8:08 pm

Re: map sensor tied to 02 readings on jimstim

Post by Matt Cramer »

Check for solder blobs and stray flux. This seems like a hardware short.
Matt Cramer -1966 Dodge Dart slant six running on MS3X
jrmfabrication
MS/Extra Newbie
Posts: 3
Joined: Tue Apr 12, 2016 10:15 am

Re: map sensor tied to 02 readings on jimstim

Post by jrmfabrication »

I have gone over the board and checked for any blobs of soldier... same result after some double checking the board and cleanup . Is there a specific area I can focus on the board that would tie the map and 02 signal together ? I have not run into this before so i am lost on where to pinpoint the issue

thanks Jake
Matt Cramer
Super MS/Extra'er
Posts: 17499
Joined: Thu Apr 16, 2009 8:08 pm

Re: map sensor tied to 02 readings on jimstim

Post by Matt Cramer »

The analog input circuits.
Matt Cramer -1966 Dodge Dart slant six running on MS3X
jrmfabrication
MS/Extra Newbie
Posts: 3
Joined: Tue Apr 12, 2016 10:15 am

Re: map sensor tied to 02 readings on jimstim

Post by jrmfabrication »

found the issue that tied my map sensor to the o2 readings . I tested on the stim and put light pressure on the cpu (u1 ) area around pins 21 and found the map readings stabilized with added pressure re soldered and all is well so far

thanks Jake
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