Did you by chance block the heat crossover off with the gasket set? The pre-heater shrouds has two ducts. One on the driver's side exhaust manifold that connects to the driver's side snorkle of the air cleaner and the other sits on the passenger side of intake manifold crossover and runs to the other snorkle.
I'm not sure what would be causing your problem but when I was running my HO intake with the crossover removed, it was a BEAR to drive and idle cold.
|