[Gmecm] 7747 stumbling acceleration when cold

[Charles McDowell]

I'm hoping someone can point me in the right direction of what to change in
my BIN to solve a bad cold acceleration issue with a 7747 TBI.  The truck
runs great once warmed up, but when the engine is still warming up (and
worse on colder days) it stumbles through it's acceleration, sometimes even
backfiring.  It sort of comes off the line decently, then bogs down and
gradually works its way up to speed.  Any pointers on what I might change to
fix this?

Not sure if it matters, but this vehicle has an open air cleaner and no heat
riser stuff.  I don't think that should be the issue since this happens even
when it's 55 degrees out, but I thought I'd mention it in case.  Thanks.
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