I want to be able to somewhat override the ecu air/fuel mixture ratio with the flip of a switch and the use of a potetiometer. The mixture is set by the ****, but I have a few questions. I heard of this being done to the water temp sensor with best results, but does anyone know the exact wires and such to tap into? Thanks

 

And this will accomplish what?

 

Fine tuning for a turbo project ....not my car though

 

I know there is products like that but they cost a lot of money and do the same thing that a potentiometer would do for only like $5 and a little bit of custom work

 

A potentiometer is not going to allow you to make adjustments based on rpm, like the SAFC will.

 

Also, a pot will only send 1 ohm signal per setting. Unless you constantly have your hand on the **** adjusting the signal maybe 10x per second(provided you know what your a/f is in real time), I seriously doubt you can do anything close to what the oem 02 can do. Provided you don't run into a tree