[boyt911sc]

Each time you crank the starter, the yellow wire from the solenoid (starter) supplies power to both CSV and TTS (refer to SC wiring diagram). The TTS does not supply power to CSV but rather supplies the ground connection. The CSV depends on the TTS for ground connection only. Without any grounding, the CSV will have an open line and becomes inoperative during the start phase. TTS as the name describes it is temperature and time dependent during its operation. Open when warm and close when cold. The internal heater in the TTS controls or limits the duration of the contact point (grounding).

To test for the operation of your CSV (detached from engine), have the fuel pump running and supply 12 volts to the CSV. A uniform spray pattern should be observed when energized. A defective CSV will cause cold start problem.

Tony