1985 Pontiac 1000 2D Hatchback, AutomaticFACTORY OEM SERVICE PROCEDURE

Fuel Injection System - Diesel: Description

The 1.8L diesel fuel injection system consists of a mechanical injection pump, high pressure fuel lines, injection nozzles, a fuel filter/water separator, a fuel cut-off solenoid and a glow plug system.

The glow plug system consists of an electronic control module, glow plug indicator, dropping resistor, sensing resistor, glow plugs, thermo switch, 2 glow plug relays and 2 fusible links.

The engine is electronically controlled in the start and warm-up modes to permit easier cold starting and cold driving. The electronic module monitors and corrects combustion chamber temperatures during preheat and afterglow modes.

The engine has an EGR system to control emissions. The EGR system components include an EGR control module, speed sensor, coolant sensor and control lever position sensor. A vacuum pump on back of alternator provides vacuum to EGR valve.

Fig 1: 1.8L Diesel Fuel Injection System
G622
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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.