Ever since I put the TFI on and a SE 1 air intake, some times when I am coming to a stop I get some exhaust smell that comes up, I have never had that before. what can be causing this?
Did you not put exhaust on also?? You are probably smelling the left over combustion at shut down coming up through air cleaner or the hot oil in air filter..
You actally should have a little smell because richer than stoich means just that.. an abundance of hydrocarbons in relation to O2 molecules. That is the reason you installed the TFI to start with.
You are smelling the "left over" molecules of the hydrocarbon side of the reaction.. As long as you don't SEE a rich mixture, a little smell is good.