Fan Switch or Temp Switch question - Third Generation F-Body Message Boards

1986iroc-z · 07-29-2009, 11:30 PM

About 2 years ago I started my carb to TPI conversion. Ended up using an aftermarket wiring unit that needed a place for it temp sensor. I used the Cold Start Temp sensor hole since mine was not being used. I never finished he project before going to Iraq. Came back and having problems because I had to reinstall the cold start temp switch into the intake. Which switch can i pull and use - the fan switch or temp switch and not have it affect the ECM? thanks

deadbird · 08-01-2009, 01:55 AM

The cold start and temperature sensor are the two you need on the fronrt of the manifold. Cold start is for the 9th injector only and the temperature sensor is for the ECM. The Fan switch should be placed in the passenger head (as a controller for the secondary fan if so equipped).