ECMlink Weird issue with oxygen sensor

[Ethan_zdon]

1996 Mitsubishi Eclipse gst (16g turbo, ecm link, 750cc injectors, cai, 3 in. Exhaust)
So my car has been running rough, has a stumble at idle and lower rpm’s. So I went out and got a used lsu 4.2 and aem Wideband set up. Car ran the same with it in and was around 15:1 at idle. About 5 minutes into running the gave me 3 dashed lines and stopped reading, data log showed as 18:1. At the same time combined fuel trim shot to + 25 and the car ran great. Can anyone explane this and is it as simple as a bad sensor and needing to increase fuel in my tune?

 

[Vegas Smith]

I can't comment on the initial issue but your sensor likely died or lost connection leading to the fuel issue. Those sensors die fairly frequently so it wouldn't be a surprise. Always run a dedicated 12v power with fuse and relay. Never share wideband power with anything else.

 

[Ethan_zdon]

I can't comment on the initial issue but your sensor likely died or lost connection leading to the fuel issue. Those sensors die fairly frequently so it wouldn't be a surprise. Always run a dedicated 12v power with fuse and relay. Never share wideband power with anything else.

What would the shared 12v and gnd cause. They should be paralleled so same voltage.

 

[steve]

Are you using narrowband simulation?

 

[Vegas Smith]

What would the shared 12v and gnd cause. They should be paralleled so same voltage.

Widebands require a lot of power and should not share their power source with any other items per all wideband manufacturers.