Why is my AFR's at WOT all over the place?
 

Cant seem to figure out why the AFR's are so erratic at WOT. I have attached a log a VD graph and the tune. Any input is much appreciated...

The VD graph was prior to the last tune and log file posted. But i forgot to activate the WB for the last pull. It did make more horse power with the last tune compared to this graph.

Mods: GS 3 Port, UICP, Custom Intake = 3 inch-velocity stack-big filter (engine bay pic attached)

I have the Wideband in the location where the Primary O2 is at. I disabled closed loop so that my trims arent affected with the O2 error.

I cant attach the log and tune file but you can see them here...

http://www.evoxforums.com/forums/sho...d.php?t=130418

It could be your load calc processing.


Check out the info here.

To see this stuff, your ROM will need my RAX Patch "RAX Fast Logging" applied to it. You'll then need to log via EvoScan in "RAX Fast Logging" mode.

I bet your IMAPCalcs is jumping up and down, affecting your final ChosenCalc load.


To fix it, modify "Load multiplier end when TPS decreased by % (hysteresis)" for your ROM. You'll likely find it is set to 0.4 - change it to 0.8.

That should stop MAPCalcs and IMAPCalcs from bouncing around.


Rich

Thanks for the reply Rich. I was acutally reading up on this earlier. Makes perfect sense as to the reason that its happening. Just abit suprised about how many different maps affect fueling -__-