OK, this is on a 406, SR, with mat sensor in the plenum. And yes, I've searched out all the posts on mat tables and read and read already! Starting to make more sense, however.....
Datalogging with TTS with mat temps from 63 to 74deg C. and I'd about dialed in my ve tables. +/-2 from 128blms.
Then it got a bit warmer and mat hit 82C and things fell apart....blms at lower and idle areas maxed at 108 and stalling. So I started increasing the mat comp counts vs mat and had to increase above 200 to get it back in range(at the 80C and up)....CTS always in the 175 to 195F range as fans cycled on and off.
Doesn't this seem like an excessive increase that was needed??? Am I missing something obvious here???? Also once the lower blms came up, then the upper ve tables would start to go lean-but not anywhere max.
Of course I still need to go back over the inv mat lookup also, but I had tried maxing and minimizing that table to be sure that table wouldn't be able to minimize the lg change needed to the mat comp counts vs mat.
This is with rttuner and romulator so I'm able to see the changes immed. (How did I ever get by without them before!)
Thanks for all input!!!

 

What MaskID?

RBob.

 

Did the battery voltage sensing go to crap on you? What I mean is that I can imagine that the ECU is thinking the battery voltage is low, thus adding an offset to the PW, but you fixed it with the MAT tables at idle, but at higher loads (larger PWs, where a constant offset now becomes less of the whole) the multiplication factor is leaning it out beyond the vbatt PW offset.

This is just a crazy whacky idea, but you should be able to see what ecu battery voltage is reading in the logs. And I mean what the CPU is reading, not the wire harness voltage.

 

Sorry-forgot to throw that in....8D

And the volt. read from the ecm is consistant-not low.

 

If you haven't seen this thread it may help out:

https://www.thirdgen.org/techbb2/sho...hreadid=265869

Not sure why it went so far off once the intake temperature increased a bit. It may be that the air is picking up more heat from the intake then it would from a TPI intake.

RBob.

 

Hmmm, OK I'll try setting bit4 to 0 and see what happens-so set to 0 it uses no temp scaling at all?. Then try a radical revamp of the mat comp counts vs mat....
I just havn't heard of this problem before with a SR??!! Nobody else has hit this problem!? Just makes me think I must be missing something obvious....
I'd thought about waiting for a hot day; adjust ve tables with the current mat tables and then scale the lower mat tables; but in using the current mat tables at the lower mat temps the ve table graph comes out pretty well scaled and smooth. Whereas when I started to readjust the 80C and up mat table and then ves-the ve scaling started looking pretty ragged.

Thanks! And open to any other suggestions!