When the engine heats up metal contacts may "move apart a little" and be a very hard problem to find.

I have two suggestions.

Coil pack and TPS. One of these two item may do what i described above and be very hard to get them to do there problem long enough to pin point the problem.

Good luck.

Eric

Just a Plain SE. AKA Big Country I maybe path914's B**** now, but wait until he needs his clutch done. We will see WHO is WHO's B**** then!