Wire in a small 12v lamp into the circuit at the CSV. That will test whether or not the thermo-time switch, and accociated wiring, are doing their job. ----- >Well, swapped cold start valve from my crashed 4k into my "new" 86 4KS. Cold >start problem still exists. What next? Thermo time switch looks brand new. >Guess PO was dealing with this prob too. Any BTDT? Please help. > >TIA, > >Jeff >