Thanks for the quick reply, Jim.
You may be right about the gas pump shutting off due to trapped air. I'll try putting more gas in it at a self-serve gas station (the ones in NJ are all attended). Now all I have to do is figure out the engine miss/surging problem!
1986 560SEC: 150,000 miles, runs great, but I've got to sell it (too many cars for one man)
1987 560SL: 122,000 miles, used to run poorly, now (thanks to forum), runs great!
1997 GMC Jimmy: Turned out to be a turkey.
1989 T-Bird Super Coupe: 150,000 miles, still runs great. Ford got it right.