PE Timing adder? Commanded advance differs from actual

[joecar]

TM only pulls timing during a gear shift.

[Supercharged111]

Looks like a big, fat negative. I'm gonna log the stock O2's and see what my WOT voltages are, that'll at least tell me if I'm way lean. I don't think plugging in the wideband behind the cats would work very well.

[Supercharged111]

Just to clarify the truck in my sig is the one being tuned and it's bone stock. I'm running 91 octane and due to the stock exhaust, no wideband yet. Once I transfer the header back from my '88, I'll have another bung welded into that one for the wideband. I tried tuning VE last night based on the LTFT, but that didn't work at all so I put the VE back to stock. Honestly, I haven't screwed with a whole lot. I've disabled the EGR system, rear O2's, and their associated MIL's. I shortened the shift times, tweaked OD shift points, and reduced/resloped TM. The main timing table is where I've spent the majority of my time and now I feel it's getting to the point that I really need to do the VE table. I also realized the other day that I need to go over basic tune up items, as the fuel filter I just replaced was pretty plugged (and made NO difference in performance once I replaced it, bunch of crap!). I only bought the truck a few weeks ago so I'm still finding things out about it. If the stock O2's, as inaccurate as they will be at WOT, indicate what appears to be a sufficient amount of fuel on the top end, then I'll be at my wits end. Tell me if I'm crazy for thinking that on 91 octane at 85kpa and a commanded WOT AFR of 12.3 that this thing should take 28 degrees of advance? Even 26 would be a kick in the ass over what it's taking right now.

[WeathermanShawn]

The only thing I see in your tune that would be pulling that much timing would be if your Traction Control is active (B1003).

If it is not off, it will pull timing/torque as described in Table B7970. I.E., if you are spinning your tires, it will drop lots of spark/torque. You could always play around with Table B1027, Minimum Spark Advance and set those limits a lot higher. Or perhaps set Table B5908 back to stock.

If your vehicle is in sound mechanical condition, no vacuum leaks, and a stock CR, don't see why you can't take 26 degrees of timing.

[Supercharged111]

How can I disable traction control? Or did I already do so by unplugging the ABS pump? There is no enable/disable button when B1003 is selected, only minimum advance which I set to the 105kpa values for now, unless there's a better answer? I don't want to touch B7970 as I'm assuming the TM for my upshifts references this table as well? I copied/pasted my main timing table into B1027 and was going to have it 5 degrees retarded from the main across the board, but then I remembered I've left some upshift TM on the table, so I ganked 18 across the board for now. At least the curve matches the main table, all I have to do is ctrl-A and increase them to whatever I want at a later date. B5908 is zeroed out, I'm doing it all via the main table. I tried pulling some from the main and setting B5908 back to stock but I still got the knock, so for now I'm working solely off of the main table. I thought I might encounter knock in OD when the motor sees 85kpa in closed loop by doing it this way, but the only knock I get is from just after peak torque on up and only at WOT. I also logged knock retard based upon RPM and throttle position and the only time I get it is WOT. That's what got me thinking there must be some TM/TR still intact, but neither of those will show up in the KR logs, only in my spark advance logs. I suppose if the stock VE map is as crappy as the stock timing map was, that could be where my problem lies as well. From my searches, I'm seeing that the MAF could be causing this, can I simply unplug the MAF and go for a drive in SD or is it more complicated than that?