oh i know, i am not saying the maf is worthless under 4K. Just not worth beating yourself up over when it comes to tuning it. Screwing with MAF tables in idle and just off idle areas can be a ball buster for some. So I always suggest just worry about higher hertz, areas that you are in PE, not closed loop. This is where we can dial in the commanded afr on a MAF tune. VE can take the rest down low IMO, maybe not others, but mine.

 

thanks for the help guys.. great explantions.. I know what i need to do now.. ive tuned VE with wideband before but never MAF so I will so some reading on that.. I did not know that the maf took over after 4000 rpm I thought ve did.. learn something new every day

 

Your MAF is reading 62 lb/min at your 6300 1-2 shifts. With my blower I only see about 56 lb/min at 6000. I don't know but that would be a lot of air flow for your setup. If you are indeed flowing that much you don't have enough injector otherwise the MAF tables are screwed up?

EDIT: I compared your MAF tables to mine and stock 6.0 MAF tables. Yours is much higher. I believe this is a big part of your problem. MAF reporting much more air flow than you actually have and trying to fuel for it.

 

Thanks KySilverado.. I will take a look at it when I get home..

 

yep i agree...bad maf values.

 

wow...

get the wideband hooked up, tune the MAF/ VE tables and be done. Its simple with HPT.

Commanded should ALWAYS be what you want. If you want 12.8, command 12.8 and it should match up unless you need tuning.

 

Aight guys.. got it down to 83% by going back to stock MAF tables.. all the while commanding 12.7 and getting 12.7.. Thanks a ton for the help.. I am going to post up log I just made with the MAF table fixed..

 

You should notice alot more power as well. Look at your histogram #1 table, notice you aren't at the bottom any more, the calcualtions are a little more reliable/accurate now. .76 g/cyl instead of 1.2 g/cyl like in your old scans. So you are seeing some higher spark and leaner fueling at WOT now. Glad to see you are on the right track.

 

btw, when you say you are getting 12.7...where are you getting that number from? Your wideband ALWAYS says that in your scan, leading me to believe it's not hooked up properly yet.

 

I was just saying based on PE table I am commanding 12.7 and in my log it is showing commanded = 12.7.. My wideband wont be hooked up for a few more days Truck feels alot stronger... thanks again for the help