The VW Jetta debuted as a subcompact vehiclein 1980 and shifted into the compact class in 1984. Changes made each model year increase both the size and power of the Jetta and it continues to be an international best seller. Investigate the Jetta fuel delivery system if the engine won’t start, if it runs rough or stalls in traffic.
Check Fuel Delivery
Relieve system pressure by disconnecting the negative battery cable and removing either the fuel pump fuse or the relay.
Slowly loosen the pressure regulator fuel line and allow the pressure to release. Reconnect all the disconnected components except the battery cable.