PFS purple
 

Can anyone help with a couple of questions.
1. How does the switch relate to the maps on the pfs. Is the switch switching between 1,2 and 3 programs. If not how is it adjusting for fuel?

2. What is the problem with the pfs and removing the cats. There is a warning not to do this. I am thinking that you get boost spikes. Can this be controlled by other means eg boost controller?
Thanks

There are 3 separate programs in the unit that you can switch between. The boost, fuel & timing can be manipulated to what you want via the keypad or pc (if you're using the windows software). Programs are generally set for 10,12 & 14 psi boost.

I'm using the PMC on my FD with all the cats off & I do get a lot of spiking. I'll be installing an Apexi AVC-R soon to see if it helps.

Chris