1988 Chevrolet Spectrum Base, 2D Hatchback, AutomaticFACTORY OEM SERVICE PROCEDURE

Fuel Injectors

  1. Unplug fuel injector harness at injector and measure resistance across terminals. All injectors must have 2-3 ohms of resistance. If resistance is not to specification, replace injector.
  2. With engine running, check fuel injector operating noise with stethoscope. Normal operation of injectors is indicated when a regular "click" is heard which varies with engine speed. If "click" is not heard, replace injector.
  3. Remove common chamber assembly. Remove all injectors with fuel hoses connected. Check for fuel leakage by operating fuel pump with battery voltage applied directly to fuel pump relay terminal (Black/Green wire on Spectrum Turbo). Leakage must be less than 2 drops per minute. If leakage exceeds limit, replace injector(s).
Factory Service Tools

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When to See a Mechanic

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

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

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