Car dies after about 20 minutes of driving,sputters slightly .

Hi
Sounds like a fuel problem to me

When was the last time that the carburetor was stripped and cleaned? Also have you checked the fuel filter? Finally, the problem seems to come and go as the engine is run (and it gets hot) check that the fuel line and any electrical cables are well away from the hot engine as far as is possible.

you need to check fuel pressure with a pressure gauge to see if its within specs.it should be around 35psi and no lower then about 32psi.your problem sounds like a fuel pressure problem and the pump should be changed as well as the filter, but check to make sure the fuel filter is not plugged as this can also cause a pressure problem.

check crankshaft sensor.

You'll have to figureout if it is a fuel or ignition problem.Is the check enginelight on ?

how do I change a fuel pump on a Buick electra park avenue?

fuel problem!!!!

map censor... manafold absolute pressure censor.. the mecanics have a hard time finding this censor it is secondary to the motor circuts but it will cause the motor to die then restart in a short time...$30.00 autozone

First step here is to have the engine control module scanned for fault codes.

I have the same problem did you find what to fix.