ECMlink Dead Front O2? Log inside

[Chad1993]

Like the title states, I'm just needing to know if my front O2 is gone or going.

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[92AWDHX40]

I cant see the log but do you have any cels is it not cycling, is It quite old?

 

[snowborder714]

I looked at an idle section in that log and the front o2 seems to be cycling properly (106-119 seconds).

If you want to make it easier, post up just an idle log with the car fully warmed up. This way you don't have to deal with driving conditions and switching out of closed loop.

Looks like you could use some idle tuning too.

 

[Chad1993]

I don't have any CEL's. It looks fairly new, I do know that the car sat for a while. I've been driving it for about 3 weeks now and have been having this "need to warm up before driving" issue. The O2 cycled until it starting misfiring then it will clear its self out. It did this for about 5 minutes, then I could drive it. I've replaced the CTS as well. When reading the log, I can see that my front O2 drops down to .02V the whole time its running lean. I mean so lean that my AEM can read it anymore. It will do it for about 10 sec at a time, and not in any pattern. Just random times.

My idle tuning was pretty close before all this started happening. Had my Combft floating from -2% to 3%. My ISC postion was at 31, Lrnidleadjust was about 144. Throttle pos adjusted properly.

I'll go grab an idle log.

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I went ahead and grabbed 3 logs.

So now my car is driving fine? WTF?!

 

[Chad1993]

Fixed it. Was front O2 sensor. Thanks for the help...

 

[snowborder714]

Odd - your idle log looked fine to me. Glad you got it fixed.

 

[Chad1993]

That very first log was when it was running so bad my aem wideband was reading so lean ---, but the next day I drove it 80 miles just fine? I guess the sensor was tired that night.