Bidi ?

[Chevy366]

What is BIDI ?

[Tordne]

In the EFILive sense is stands for Bi-Directional Controls. These allow you to perform some limited realtime changes to spark, AFR, fan, and a bunch of other stuff. Before the RoadRunner this was the best way of attempting to find a sweet spot without uploading tunes constantly.

[joecar]

Also, it lets you turn any solenoid/relay on/off so you can check the operation of that component/circuit.

[Chevy366]

So is this like the controls in Scantool that lets you change setting on the fly ?

[Tordne]

Yup.