Car engine shuts off after fifteen to twenty minutes of running

Scan for codes first. Get back to us with codes or look in repair guide on site. Also check for soft vacuum lines to map sensor on firewall and any other one as it may be sucking closed cutting vacuum off and engine. Finally have ignition module checked at auto parts it may be heating up and going bad and use dielectric grease when reinstalling. Also check wires leading to pick up coil in distributor for frayed/chafed etc. Also if you have a tachometer pull the white wire on distributor and if it quits the tachometer is the culprit.