1989 Chrysler Conquest AutomaticFACTORY OEM SERVICE PROCEDURE

Fuel Control: Injectors

  1. Using a stethoscope, check operating sound of injectors. Only Black injector should operate during engine idle and cranking mode. Both Blue and Black injectors should operate during engine high speed mode. Ensure operation sound increases with engine speed.
  2. Remove large plastic air intake pipe. Disconnect secondary ignition cable from ignition coil. To check Black injector operation, look through air inlet of injection mixer while cranking engine. Unless fuel delivery is very poor, injector fuel delivery should be considered normal. Turn ignition off and ensure injector is not leaking.
  3. To check Blue injector, connect Black injector connector to Blue injector. While watching injector fuel delivery, crank engine. Unless fuel delivery is very poor, injector fuel delivery should be considered normal. Turn ignition off and ensure injector is not leaking.
  4. Disconnect injector wiring. Check resistance between injector terminals. Standard resistance is 2-3 ohms at 68°F (20°C) for each injector. If resistance is not to specification, replace injector.
Chapter Navigation
Return to Chapter: Fuel Control
Factory Service Tools

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.

Shop Manual-Ready ToolsCompare Repair QuoteQuote Shield Pro

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.