Focus AFR change with ac off on
144 views · Published 2 May 2013 · 0:56 · Indexed 14 October 2026
Channel: Jeff Jackson · 2013 · Autos & Vehicles
Here you see that my AFR's dip down to rich while the AC is off. When i turn it back on the AFR's recover and settle perfectly. I have no idea why it does this, if you do let me know! EDIT: I found the problem ( a few years ago :0) I cleaned up the wiring in the engine bay, when i did i put the Air Fuel Ratio meter wires in a wire loom with other wires carrying power.(Battery wires, ac relay wires etc). when you apply power to wires it creates a magnetic force that drives sensors crazy. It was distorting the signal from the AFR sensor. So my car was fine but my readings were off. Lesson learned, don't run sensor wires next to power wires or Antenna wires! Ok back to working on your car!
