Classic FAST B2B: The unused Injector Drivers?

[peterkin]

I think I have a bad injector driver. I have a faint miss at idle that's been present, in the exact same manner, using this system on two cars now. It seems to be the #1 cylinder. I switched back to the factory ECM on the Turbo T and it idles fine, with no miss......add the FAST ECU into the mix and the miss is back.

I cracked open the FAST ECU and there are eight drivers on the heat sink. Obviously two of them aren't being used, but I'm unsure which two they are. Looking at the board, the driver locations are labeled U1 through U8. Am I safe in assuming that U1 through U6 are the drivers that are used for our animals, and U7 and U8 are the unused drivers?

 

[Lance]

If B2B, just swap wires to one of the unused injector output pins on the ECU. Preferably an output on the same bank as the problem output That said, it's pretty rare that an injector driver would go bad. More likely to be something else.

 

[peterkin]

I don't have the pin out for the FAST ECU. Do you know where I can get a diagram?

 

[pacecarta]

its in the software for c-com wp
startup c-comWP and open help> contents > ecu pin out

diagrams are here
http://www.horsepowerconnection.com...s/item/249-fast-wiring-schematics-white-sheet

 

[peterkin]

Thank you for the info and the guidance.