Hey everyone-

I am in the middle of a carb swap from tpi on my 89 iroc.

I am keeping the ecm in the car since it seems to control a lot more than just tpi stuff.

I am unclear how my fans will work in this swap. The fan switch in the rt side head controls when the secondary fan comes on true? does the cts control when the primary fan comes on?

If the above is correct, does this mean the ecm is controlling both of these functions?

At what temps should the fans be coming on in a carb set up?

i have the same question.....