Loosen the locknut with a wrench on the fuel injection pump.
Using the adjustment screw on the fuel injection pump, turn it clockwise to increase fuel quantity or counterclockwise to decrease fuel quantity.
Tighten the locknut.
Start the engine and test drive it to evaluate it's performance and tune as necessary.
Remember, this process can impact your vehicle's fuel efficiency and emissions, so it's best to consult with a qualified mechanic or refer to the manufacturer's specifications for the correct adjustment procedure.
