I noticed today while dynotunning that my A/F was at 12.0 with -10 in the PE table for PE vs. RPM, well I went to -20 & it made no difference, I then went to -30 & still no difference, acctually it went a bit richer to 11.9 A/F on the wideband & the o2s were reading higher.

Is there a sertain point where the PCM just ignores the PE table numbers past a sertain value? I figured maybe its because the PE vs. TEMP was at 16 so putting anything less then -16 ie. -20 the PCM gets confused? Or is there just a number where the PCM just doesn't listen? I'm wondering maybe I should have altered the PE vs. TEMP portion after I saw it was doing anything, but I altered the MAF table a bit & it went leaner.

So I'm just wondering what if there is one is the cut off point for going leaner in the PE table, ie -10, 15, or what?

Thanx guys.

Matt.

 

Not that I've ever seen.

 

I've also noticed that once. What injector brand and size are you using? What value in the PCM?
Might want to try a higher injector value so that the PE tables shift up some.

 

if you are running an OPEN LOOP tune, the PE tables are NOT used.
just an idea

 

Yep, I learned this the hard way!!!

Steve

 

No F*cking way, seriously? I had no idea, the car was definetly in open loop in between pulls on the dyno, ohh man what a waste of a dyno tune!!! Good thing I didn't floor the car after the dyno, LOL.

 

So you weren't letting it kick into closed loop before dyno pulls?

 

No I didn't LOL stupid me.

Matt.