I have a 1997 Jetta hex vr6 I have a misfire in cyl. 6 and a p1300 car fires up smooth then shuts right off give it fuel an it's in a like a limp mode barely runs

SOURCE: P0303 and P1300 together (Cyl. 3 Misfire)

CODE P1300 IS MISFIRE DETECTED FUEL PROBLEM. WHICH MEAN 3 FUEL INJECTOR IS CLOGGED UP.HAVE FUEL INJECTORS CLEAN AND CHANGE FUEL FILTER.

SOURCE: 1997 isuzu rodeo

The firing order for a six cylinder is 1-2-3-4-5-6 distributor rotation-clockwise...cylinders 1-3-5 on drivers side...2-4-6 on passenger side

SOURCE: 1999 VW euro van VR6 (2.6 L V6)

CHECK THE SPARK PLUG +WIRE +COIL.TO THAT CYLINDER.IF ALL IS GOOD.DO A COMPRESSION TEST ON THAT CYLINDER. IT COULD BE MECHANICAL PROBLEM IN THAT CYLINDER.LEAKING VALVE OR INTAKE LEAK.

SOURCE: misfire cyl's 1,3,6

Have you tried replacing the ignition coils? If they get old and stop working, or if they're damaged, they won't send a strong enough spark to the plugs. AutoZone (I think) apparently does free diagnostic codes for a check engine light. I don't know if you have a check engine light on or not, but maybe the light burned out? It might be worth a try to call them and ask if they can check the codes for you for free.

SOURCE: 2004 Saturn L300 6 cyl.

The starter and or solenoid on your Saturn L300 would need to be replaced. I would first replace the solenoid. When your engine heats up there is too much resistance to allow it to engage. I have seen this problem on 5 other saturns and the solenoid is very inexpensive. Hope this helps!