As I am getting ready to order a kit to build, I find myself in a bind were I don't have the space I need to wire up a harness. So I am looking at doing one of the Plug and play setups, which brings me to my question:

If I do one of the plug and play setups on an S4, am I able to remove the afm setup or is this setup dependent on having its input. This as well as the variable resistor are some of the things I would like to remove from my setup.

 

All the stock EFI stuff is removed or bypassed. The variable resistor goes away.

As for the AFM, it gets removed as well and you will need to jumper the switch wire (brown I think? Check the wiring diagrams) to allow the pump to run or even better, rewire the old and crusty stock wiring with something that won't fail.

 

Thanks for the response Aaron, its what I needed to hear. Using the plugnplay plugs into the oe harness but then allows me to remove the odds and ends that need to go or are no longer needed.