Fixed!
2000CAYukon,
First, thank you immensly for you help. I agree that next point was going to be the Fuel Pressure Regulator (FPR)...However, the guys at shop offered free replacement of the pump because it was under a parts guarentee. The new pump now holds pressure and only primes up to 62psi, no over-pressure conditions. I was worried the last pump might have caused some damage. But I think we're good.
My Tahoe is now running even better than it was before (probably due to ignition components being replaced).
David,
Are you smoking at idle as well? My vehicle would sputter/smoke for a while then sometimes return to a (semi-decent) idle if I just left it alone.....but as soon as I touched the throttle would sputter and load up...till I got it above 1500rpm.....
There is an idle mix sensor just behind the throttle position sensor that someone recommended I replace (along with the others..MAF, MAP)...I'd start just as 2000CAYukon suggested. Plug in a fuel pressure guage and watch it for at least 5 min. Make sure your getting real close to 62psi (ignition key turned, not started). And that it holds that pressure.
Good luck, and thanks again CAYukon!
CrazyHerb
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