I have a 92 pont. bonneville. Cold starts easily, drives for about 20 mins then stalls dead. difficult to restart right away. given a few minutes does usually restart. When stalls, doesn't hesitate or sputter just dies. Tried putting in bottle of fuel injector cleaner. Dont know if this helped, only had it in one day so far and problem continued.
I have a99 Bonneville with the stalling problem after 15 minutes of driving it stalls and when trying to restart sometimes it will go but other times have to wait for it to cool off, I had a code po 172 changed fuel filter, fuel pump, coils, air mass flow sensor, exhaust system, ail filter pcv valve still does the same now miss firing with the mph now going crazy
Have you chg.fuel filter and had a fuel pressure test done? Does it have spark after it stalls? Fuel pumps are a common problem, they work when cold get warmed up they quit, after a while quit all together. Do the fuel pressure test.
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Starts when its cold. Has to be revved up for a minute until it levels out. Will run up to highway speed, but has some hesitation, and not at full power. Runs rougher in town at slower speeds. When idling the check engine light will flash. After car dies will not restart for 1 to 2 hours.
Things we have tryed. Replaced the spark plug. Replaced PCV valve. Replaced upstream oxygen sensor. Have put fuel injector treatment in. Also tried with both fuel lines off, and the key turned on, and got no fuel to bank 1.
Also started engine with bank 1 fuel line disconnected, and got no fuel.
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