Engine Stops when it gets hot

[mnc-i]

My 1999 Boxster (automatic) stopped on me yesterday and would not restart. It would crank and crank, but not catch. After letting it sit for about 30 minutes, it started and ran just fine. I had it towed home anyway.

This morning it started on the first try and ran well. Less than half a mile from my office parking lot the engine suddenly stopped and would not start again. I've parked it and will take it to a local Porsche mechanic later today. The nearest Porsche dealer is in Austin.

There are no warning signs (sputtering, etc.) or check engine lights.

Any idea of what is getting so hot that it causes the engine to cut off?

MNC-I

[RFM]

The crankshaft position (TDC) sensor, DME and fuel pump relays, electrical portion of the ignition switch are suspect with those symptoms, there are still other causes possible but occurs less frequently. A PIWIS or similar diagnostic tool could help with their fault finding program as well.

[Keith Hatfield]

My 1999 Boxster (automatic) stopped on me yesterday and would not restart. It would crank and crank, but not catch. After letting it sit for about 30 minutes, it started and ran just fine. I had it towed home anyway.

This morning it started on the first try and ran well. Less than half a mile from my office parking lot the engine suddenly stopped and would not start again. I've parked it and will take it to a local Porsche mechanic later today. The nearest Porsche dealer is in Austin.

There are no warning signs (sputtering, etc.) or check engine lights.

Any idea of what is getting so hot that it causes the engine to cut off?

MNC-I

Might be the ignition problem you frequently read about. I've had to repair mine twice so I'm like the guy with a hammer that thinks everything looks like a nail. Mine wouild not start not start. Then I'd jiggle the key and it would start, but then the engine would die because natural vibration caused the ignition connection to disconnect. Finally, jiggling the key would work less and less. Don't even know if they have a coil, but in old cars coil failure would cause the problems you describe.

[mnc-i]

ALCON,

The issue of my Boxster cutting off whenever the engine got hot was caused by a faulty fuel pump.

My mechanic is replacing the fuel pump, the fuel pump relay and the fuel filter.

Thank you all for the feedback.

MNC-I