Marky Dissod
Full Access Member
By the way, I have this exact same problem with my BONE STOCK '02 Tahoe; it behaved this way before the tune,When you are sitting still in drive, with foot on break it idles fine.
when you take foot off brake, it gently accelerates up to about 1500rpm ish (not positive on the rpm here) and then it calmly shifts into second gear.
None of this is done with any drama, and it leads me to believe that its either some kind of re-learn thing or maybe a transmission computer adjustment is needed. maybe its just that much of a power difference.
Has anyone experienced something like this?
My last step will be to do a datalog and send the info off to BlackBear for a final tune. Maybe that will address it.
and my tuner was not able to ameliorate this odd behavior with the tune despite several attempts. In other words, it may not be the tune?
Drive normally in such a way as to make the fault-behavior more likely to present itself,
so BlackBear can get the relevant data.
If the behavior presents itself during a very-cold-warmup, show him that too.
If it only presents itself once fully warmed up, then just show him that.
Forced to guess, I'd clean the MAF, IAC ... you don't have an IAC ...
clean the throttlebody, then recalibrate it ...
Is your engine FlexFuel-ible?