Owner induced fuel starvation
Thanks for the thought on the fuel pumps, Henry. I had already checked, and they both seemed to be operating. The car ran fine before, and still idles and accelerates fine up to about 2,500 rpm. I'm kind of stumped, and wonder if the system needs to be bled somehow (air-bound?). Also tried opening the fuel tank cap in case the vent was somewho clogged and set up a vacuum condition in the tank. Still no go.
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.