2008 sierra tuning questions

[Jarodpurvis]

I resently purchased a trinity. I have a 2008 gmc Sierra 5.3 with a air raid cold air intake and a catback exhaust. I was doing some reading up on how to tune ur vehicle and I got a couple questions.. I'm trying to get my LTFT set up and on the highway bank 1 was 4.69 and bank 2 was 3.89??(I think). I read that you want 1-2 banks at -2-0 so I dropped it down 5 points and seems ok.. Is that correct?? And I was wondering How to adjust the Power enrichment and what should it be at? And what gauge do I gotta look at?. The truck seems to hesitates and seems like it kinda misses when I start moving for a complete stop. Then around 2500-3000RPM it seems fine.. What could be the issue there?

[06MonteSS]

all depends on what the intake air temp was during your data log... if it's colder temps now where you are, then your fuel trims should be a little on the positive side, so that when the normal warm/hot summer weather is in your area, THAT'S when you want the fuel trims to be around 0 to -2...

as for the PE, generally you can adjust that to half of what you adjusted the slope to... so if you adjusted the slope to -4%, then you can adjust the PE to -2% in all rpm ranges.....

[Jarodpurvis]

Ok thanks a lot. Do You have any idea why it would be spuddering at idle? I noticed it only does it when it is drive with my foot on the brake at a stand still. Seems like it can't hold a steady idle.. It will be at 650rpm then drop to 520rpm then back up. And when I start to drive off it seems like its missing or spuddering or something till about 2000-2500rpm and goes away and drives fine. Have any idea what would be causing that. It even did it in the 87 tune that came with the trinity

[Jarodpurvis]

Would adjusting the timing help?

[Jarodpurvis]

I been reading up and guys saying it could be the MAF sensor. Whats the rev speed limiter?