Got some WOT o2 numbers- lean?

[xjarayax]

O2 B1S1 0.718241379 avg WOT B1S1

O2 B2S1 0.759103448 avg WOT B2S1

0.738672414 avg WOT O2's


What number should I be shooting for? And is this WAY lean or just kind of lean?

Sam

[ August 02, 2003: Message edited by: xjarayax ]</p>

[John_D.]

That's quite a bit lean.


How much did the readings vary (high to low)?


How did you get those averages?
- Only rows with tps = 100?
- Only rows with fuel cell = 4 (or whatever it is for wot...)?
- All rows in the log file, turning logging on when you floored it, and turning logging off when you let off?

[xjarayax]

Want to see the excel sheet? I don't really know how to read it.

Sam
jaraya@austin.rr.com

[John_D.]

<blockquote>quote:</font><hr>Originally posted by xjarayax:
Want to see the excel sheet? I don't really know how to read it.

Sam
jaraya@austin.rr.com<hr></blockquote>

Yep. You can post a link or send it to my email (johnduncan10@hotmail.com)

[xjarayax]

I emailed it to you a couple hours ago :cool:

[Seppo Kaitainen]

chit dude thats pretty lean... generally .89 or so. But then again O2 sensors are not that acturate.

[xjarayax]

Yeah I adjusted my FMU, hopefully that'll knock down my 10* of knock retard too :eek:

[xjarayax]

Thanks for moving the thread [img]graemlins/thumbsup.gif[/img]

[John_D.]

Yeah, until the lean condition is resolved, I wouldn't worry about the kr. Much of that will go away.

I've been looking at the spreadsheet just now. Took me a second to realize that it was several wot runs in there, with the in-between rows removed...

Something bad is going on. Look at that last run. Row 131, and 140, both show a .34 o2 reading on bank 1. 131 is right before a shift. 140 was not. That's WAY lean. Bounces right back though... Bank 2 is not dropping down lean like that at all. (still the .7x on bank 2 is not good, but it's much more consistent)

So the inconsistency on bank 1 is bugging me. It's usually around a shift point, I'm noticing from the other runs. Were you hitting the rev limiter?

As far as your averages, they are probably just a teeny bit higher. Usually the first row (or sometimes two rows) in each wot run are a litle low, where the pcm had not gotten the mix richer yet. So you could probably throw out those outliers. I don't think this amounts to much though.

The other thing you need to figure out, is why the maf reading is holding steady, or sometimes dropping, while still building up speed in a particular gear. Row 11 shows a dip, not too much, but some. At 66mph. Row 22 shows the same thing, at 64mph. The shift doesn't happen until somewhere around 75mph, so it was still pulling and the maf reading should always be going higher.

Same thing at rows 53-55. You were getting 27.94 at 65mph, then it held 27.94 through 68mph, and was only at 28.01 at 74mph.

Another example is rows 75-78, from 57mph to 66mph. The air flow went 26.09, down to 25.76, then up to 27.09, then down to 26.7. It should always be going up... Not up and down. (except it makes a big drop when you shift gears)

Did you port your throttle body? I think the maf sensor is off some, and you may need to do something different there.

You may need a different maf sensor to make the readings more consistent.

Also how is the blow-off routed, could that be throwing the readings off some?

You may need a maft to adjust the wot maf readings in order to get the a/f where you need it. To bring the maf readings up in general.

Keep an eye on pulse widths on the injectors when you get the injectors flowing more, and make sure they are not maxing out too...

[ August 03, 2003: Message edited by: John_D. ]</p>

[xjarayax]

The blow off could definately be setting off readings a bit, it is venting to the atmosphere, and not routed back in.

I have not done any runs with the fatter mix yet, that'll hopefully be tonight.

I think why it isn't flow any more is because at X rpm it's hitting 7 PSI of boost and holding at that til redline.