Fuel Injection Pump

1984 Mazda B2000 Sundowner Sport, StandardSECTION Fuel Injection Pump

The Diesel Kiki VE type, single plunger, mechanical injection pump contains a low pressure vane-type fuel pump, a high pressure distributor-type injection pump, a centrifugal governor, and an injection timing advance mechanism.

The vane pump output pressure (sometimes referred to as injection pump body pressure) averages between 50 to 100 psi depending upon engine speed and application. The plunger injection pump boosts the fuel pressure to about 2000 psi. The pump assembly is also equipped with an electric fuel shut-off valve and a cold start device for fast idle speed actuation.

Fig 1: Fuel System Schematic Bleed air from system whenever fuel lines are opened.
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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.