My wideband out of nowhere stuck on almost full lean when driving today, and moved to maybe MAYBE 15 underboost. I didn't put it in to boost after seeing this as this car just had a huge altitude change from me moving and we are currently working on a new MAP now.

The car had actually been running superb, and it felt the same after the gauge whacked out. Though I would rather be safe than sorry.

Here is a quick video I just took going from idle to holding 3k to idle.
http://www.youtube.com/watch?v=IBpULHG1B0s

Then I found this video, however I cannot readily do this test atm so figured I would post anyway and see what fellow FI's views are.

http://www.youtube.com/watch?v=1mb4VmDd0ao

 

Looks like bad o2 sensor or bad wiring to be honest... I've never seen actual A/F's act like that (I have the same AEM too).

 

I'll have to check the wiring later this week, though I'm pretty confident it wouldn't be the culprit.

What are our replacement options for a sensor? I hear of people using the o2 from VW since it's cheap.. recommended part # anyone?

 

Pretty sure it's a Bosch sensor.

 

Either the sensor went bad or what happened to mine is the wiring at the back of the gauge became loose.One of the pins wasnt making good contact.

 

My AEM went bad after about a month of running rich on a base map it displayed full lean with 3 dashes across the screen... Swapped it out with a Bosch replacement tuned the car n I'm all good.....