[Lorenfb]

Bosch CDs can be intermittent, but the SC type is rarely
intermittent. They either work or they don't. Some, though,
have a hot start problem or cause back-firing when hot.

You may have done unnecessary parts replacement in the
dist. area. The problem sounds to be fuel related. You don't need
to replace the O2 sensor for testing, just leave it disconnected.

You need to isolate the problem to fuel or ignition, and don't
do the shotgun approach. Take your time. The next time you
have a starting problem, check for a good spark.

Check the website Systemsc.com (Diagnostics) for some
troubleshooting hints.

Good luck
Loren
Systemsc.com