SOURCE: Car starts then stalls once the engine warms up.
You need new timing belt and gears. Buicks gears are made of plastic, and become a big glob. Nothing for the timing belt to grab onto.
SOURCE: Sputters and Stalls...
sounds to me like the coil is failing the heat once it is warmed up makes it misfire so once it cools again it will start but stop again also check the spark plug wires there may be a bad one or even the plugs it isn't the heads or head gasket or cooling system because you would see white smoke and have water in the oil and vise versa this is a firing issue
SOURCE: 97 M3 chokes on clold start.
The E36 M3 is natorious for having some minor enigine hesitation immediately after a cold start. My car does this for about the first block both in the morning and after work. Its part of the engine management start routine: you will see this more specifically if you just start you car when its cold and let it idle. Initially you'll notice that the idle tone is a bit more rumbly and rough; but after about minute or so you'll notice that pitch changes and smoothes out. I was alarmed about this too, but after some research, I found it was a characteristic of the design. Just take it easy for the first block and you will never notice. Don't ever cold rev your engine. - Hope that helps.
SOURCE: Car runs rough and misfires
if u checked the codes and it showed that a o2 sensor is bad make sure ur on the rite one as in {sensor 1 bank1 or sensor1 bank 2} when u change a sensor always make sure u got the rite one.
hope this helps
SOURCE: Car starts,runs for a few minutes and stalls.
It could be the TFI (thick film ignition) ignition module on the distributor. When it restarts warm, but dies right away, it has a cranking circuit to initially fire the engine. After that, it switches to run mode, which may be be the problem circuit. Often times, when you take the cover off a bad module, it will have a bubble in the jell where the open circuit has heated up. Heat is the enemy of all electrical components and when they get warm is when the problems show up. This is my first guess. If you have access to a fuel pressure gauge, you can hook it to the pressure tap on the fuel rail and watch for a drop in pressure. It needs around 40 psi to run. Even a clogged fuel filter causing low pressure and flow can shut you down, but it shouldn't run good cold in that case either since fuel demand is higher on cold start. I hope this points you in the right direction. If not, I'd be glad to continue assisting your diagnosis.
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