O2 sensor freaking out

[A fireman]

I just wired up Megasquirt to my sensors and it seems everything is reading well except my O2 sensor. It reats 14.7 without ever changing on an engine diagnostic computer but om megatune it holds 14.7 for a very short time and will suddenly rocket past the 28.0 limit. is this a bad connection or do i have a bad sensor? While I'm at it can any one recommend a wideband O2 sensor I can put in to replace my stock passenger side O2 sensor. thanks

[ssms5411]

Re: O2 sensor freaking out

www.getgmparts.com has a good selection of Delphi O2 sensors , at good prices.

[A fireman]

Re: O2 sensor freaking out

ssms thanks but none of them are labled as wideband. Also the sensor im pluged into is a single wire so will that make a difference?

[ssms5411]

Re: O2 sensor freaking out

ssms thanks but none of them are labled as wideband. Also the sensor im pluged into is a single wire so will that make a difference?

I would use a stock sensor on the manifolds and place the wideband right before the Cat, thats the way mine is set up, for wideband 02's , I get Bosch style for about $60 shipped, which my current Bosch sensor has lasted 7-8 years and still works fine. Misread about it being a wideband 02, sorry.

[A fireman]

Re: O2 sensor freaking out

thanks ssms also I loooked over all the options on megatuner and it seems it was expecting the signal range to be 0-.517V and it should be 0-1V that seems to be why it would spaz out at random

[ssms5411]

Re: O2 sensor freaking out

No problem , I have no idea on how the MS works so I was just listing parts, I thought would help , sorry I couldn't help much. Glad you figured it out, I also forgot it was a 3.4 so I wouldn't be much help anyways.