it runs and idles great but stalls, has new fuel pump,fuel filter,alternater,battery.drive it for a few mins. and it stalls sometimes and will start right back up.stalled three times yesterday than ran great for 30 mins and shut it off than it wouldnt st engine contrlart,tried for 30 mins finally unhooked battery for a min and it started. im thinking maybe air mass flow sensor or o2 sensor or
stalling on 1991 Buick Century
It sounds like you may have a problem with the ignition module or the crankshaft position sensor on your 1991 Buick Century. The first step in diagnosing your problem would be to check for proper spark and fuel injector signal while the engine is NOT starting. If there is no spark suspect crankshaft sensor or ignition module. If there is spark and no injector signal, suspect ignition module or engine control computer. When the problem is occurring it should not be very difficult for a qualified technician to diagnose you problem. It may be a good idea to pay for the diagnoses instead of guessing at the problem and just replacing parts.
I have a 1991 buick century and I experience the same issue. My mechanic found rotted rubber hoses to intake manifold and a few other he changed. Once that was done the car no longer stall or cut off at stopping. I assume it was sensor but it turned out to be as simple as a burnt hose. So I suggest checking the little hose on car before wasting money..