[Wayne 962]

Some comments:

1) I think it might be a vapor lock, or let's call it a "hot fuel" issue. Vapor lock can occur with recirculating systems all the time - just ask 914 owners.

2) agree

3) agree, coil packs are good, although just because you have spark, doesn't necessarily mean you have spark at the right time (timing). This is a common mistake in diagnosing older cars, but I don't think it's very applicable to the Boxster

4) Fuel supply problems don't show up on the PST-2 I've found (from experience trying to figure something similar out). All your sensors are probably okay.

5) This is odd though - as the pump shouldn't be running when it's in the first position, unless as a conversion to Boxster Spec, you wired up the pump to run continuously?

6) Low volume indeed could be related to the hot issue. I would have recommended changing the pump, but you did this already indeed

7) Right - the alarm will stop the starter from turning - it doesn't affect fuel. So, if your starter is turning over, it's not an alarm issue (good thing for people to remember for troubleshooting in the future).

8) YES - I was going to ask about this! I think it has something possibly to do with your vent system. If the system is closed with no vent (sometimes this equipment is removed or altered on these spec cars), then the fuel will try to pull vacuum on the tank. You can collapse your tank (if you still had a stock plastic tank) if the venting is not setup properly.

My suggestions:

- Get a fuel pressure gauge and install it permanently into the engine compartment. Check it when cold and when hot - that should give you some good clues

- Check out the gas filler - try removing the gas cap and stuffing a long screwdriver down there when the car won't start. There are several valves in there that seem to fail all the time.

- When hot, check the fuel pressure, and then shut it off, and then check the pressure again when you're trying to start it. See if they are the same.

- Check out why the pump is continuously running - I'm pretty sure that's not supposed to be the case.

- You might want to try to pull an injector side rail off and see what the injectors are actually spraying. I've done this with other cars, but I haven't tried it with one of these M96 engines. I'm not sure it would be too easy.

Hope this helps,

Wayne