1991 Oldsmobile Cutlass Supreme Q&A
1991 Oldsmobile Cutlass Supreme Question: Could the ECM in my 91cutlass supreme3.1v6 cause engine stall while under power?
Car has done this several times while ive been trying to accelerate. It runs fine when cold but once it gets up to temp begins to be sluggish and often stalls out. When it stalls out it wont restart for an extensive time period. Fuel pump, filter, and pressure regulator have all be swapped out for brand new ones. No vacuum leaks or anything, and getting plent of fuel to the engine. My father and husband are both mechanichs and they are stumped. We finally had it towed to a shop the last time it happened and they've been using it as a parts run car and still can get it to die so they can diagnose it. They have driven it for hours and nothing. PLEASE HELP! - ShelbyD
The anwser is yes its possible the ECM is your problem but I don't think its very likely. That car has some history of shorted fuel injectors doing as you discribe. Next time you get it to act up try spraying some cleaner solvent into throttle and see if will start. If it does try to run then check resitance value of each fuel injector. When measuring injector resistance, the highest injector is usually the best injector. All other injectors should be within 0.3 ohms of the best injector. If 2 or more injectors are shorted, consider replacing the entire set. - milesauto
these cars have mass air flow issues while idling in park tap on mass air flow and see if car dies. also when was the last time u repl fuel filter. - globalhelper