any idea where is the best place to pick up a signal for the AFR?
i'm having trouble finding the signal wire.
its a 1994 WRX.
cheers,
simon

 

Simon,

On the 94 WRX the MAF sensor signal line is B43 - 9. The oxygen sensor is B43 - 6. The easiest way to find these connectors is to locate the two power feeds b43-2 and b43-13 these are thickish yellow/blue cables in the right hand connector block on the ECU (the bottom connector when mounted in the car). I connected a Lambda link to the Oxygen sensor to give AFR.

All information kindly supplied by Bob Rwale at BRD.

Stuart

 

thanks for your help- much appreciated. now to try and solder the wires without melting the ECU!

cheers,
simon