For clarity on my 89 Marelli,
B - ground
KB - battery
GW - A bank ECU adjustment amount
GR - B bank ECU adjustment amount
- ECU adjustment should read 2.5v per [xj-s] red plastic connecters in trunk
During checking these, the A bank was rich at 2.9v and B bank lean at 2.0v - measure with multimeter and not a fancy oscilloscope.
Due to kncoking of the 2 A bank injector, I’m thinking that’s why its rich. O2 sensors are new.
Once I replace/rebuild that injector, I’ll see where the readings are.
A pic is worth 1000 words…
