Seems to be running ALOT better. There's still a VERY slight twitch at idle, but nowhere near as bad as before. Didn't bog down off of any red lights, either.
I was curious about the timing. Its set right at 0* with EST unplugged, would advancing it a bit help her run a little better?
Set it at factory until you know the problem is sorted.
Drive it for a couple days to see if it's really gone or just a coincidence.
Generally, you can gain some benefit from advancing the base timing on gassers.
But guys often try to apply old techniques to new tech without understanding what's really going on. On older systems ( ie: pre EFI and post points) you could adjust base timing and it would add to total timing since the dist weights would move out at their determined speed and add the same amount they did before advancing base. Hence; more total timing and a few more ponies.
The thing is, total advance is controlled by the ecm on these trucks. I could be wrong (memory isnt quite what it used to be), but i seem to remember that advancing base timing won't change total advance.
That needs to be done in the spark tables in the ecm by editting and reflash.
Even if you dial in too much, the ecm will start seeing the knock count going up and start pulling timing out. Something you had to do yourself (ears) before knock sensors and efi if you dabbled with base timing and weights.
To much base timing will also make starting (hot and cold) harder.
Someone can chime in here if i'm remembering it wrong...I don't really mess with gassers that much anymore and it's been a long while since I've been down in the guts of one as old as a 92....
