Have you checked the wiring in the car? If it is old it may have a bad wire with a break or corroded inside the jacket. Heated up it expands and may be losing contact. Just throwing another possibility. You can check with a multi meter when cold then hot. My car did this with the starter wiring.
Scott
__________________
69 Camaro RS/SS X22 4speed NOM but working on something special
69 Camaro x11 355 crossram m22 12 bolt 3.73's
|