Misfire on 4 every 500 miles

[silverbeam]

2002 w/ 57,000 miles. It is not the coils, plugs have been replaced. This is the third time it has happened, all three times it has been at 500 mile increments. Not the gas cap.

First time changed the plugs, swapped the coils

second time, same cylender so not the coils, tightened up small oil leak

This time it happened 400 miles away, and the car is at a shop I do not trust. If it were me, I'd just drive it home, but it's my mom and she won't. I would like ideas on what it is so I can have some education and I can call BS if needed.

Thanks.

[450knotOffice]

Have you tried the Rennlist forums? The 996 forum over there is really active.

http://forums.rennlist.com/rennforums/forumdisplay.php?s=&forumid=60

[WPOZZZ]

Is that you, Lauren?