This Unit is a variable resistor that 'splices' into the wire between the Oxygen Sensor in the outlet manifold and the EFI circuitry. It allows manual 'leaning' of the fuel supply in EFI systems.
Maily used in Petrol/Gasoline engines.
Not required for Diesel or LPG converted engines.
This product was added to our catalog on Tuesday 19 June, 2012.