bnl107

Just did a half-throttle 1-3 gear run. Ran a few different logs, but did this block 031 log of the O2 sensor voltages at the advice of a few of you after posting about my MBC install. I'm not sure what I'm looking at here, so maybe you can tell me if everything looks ok. Thanks.

<img src="http://www.personal.psu.edu/users/b/n/bnl107/O2%20Log.gif">

5lugnuts

try a 2nd gear run to redline.

bnl107

When I asked before I was told 1/2 throttle... can anyone verify this one way or another?

tusca

He indicated earlier that his symptoms only occur at 1/2 throttle.....no symptoms at WOT

bnl107

Yes, he is correct. My mistake for not explaining that in my original post. Thanks tusca :-)

bnl107

Almost 60 views and no one can tell me if this looks normal or not?

PSmalls::DoggieStyle

That is why we have long term fuel trims, so the ECU can correct fueling at idle and part throttle in order to run at stoich.

I don't think logging 02 voltages at part throttle was a brilliant idea because of this, but just my 2 cents. IMO, your log is worthless and is of absolutely no importance. But then again, maybe I'm missing something!?

bnl107

... I am having my boost surge issues at 1/2 throttle). Like I said, I don't know what I'm looking at with that graph anyway, only did it cause someone recommended that I should (I'd love to find the post, but the STFA and Beta STFA are both worthless, say I only had 1 post in the last 2 weeks *rolls-eyes*).

BLK01S4

2nd that.