14 open road 2.hpltune 10 increase spark advance smooth table around 2k to 2.5k drfop 2 degress 400 through to 240.hptHi, new to go tuners, grown out of turning/riding sports bikes and looking to improve the off the mark for 2500 suburban 6.0 2004. Have played with some tm reductions and spark table, had table smoother from 2000 down to 400 rpm but started to note slight surge at very small throttle opening cruise.
Do not have Wideband, not usually up high in revs, also use to tow bayliner boat occasionally. Transgo HD2 shift kit installed, exhaust done cat back, k&n airfilter in stock housing. Run on 95 or 98 octane fuel.
Any advise greatly appreciated,
(Files to be added from laptop)