Colt, Raider & Ram-50

1987 Chrysler Conquest 2.6 H, StandardSECTION Colt, Raider & Ram-50
  1. Disconnect Green-striped hose from throttle body and connect vacuum pump to hose end. When engine is cold, 113°F (45°C) or less, and at 3500 RPM, apply vacuum to hose. If vacuum leaks from thermo valve, system is okay.
  2. When engine is hot, 185-205°F (85-95°C), and at idle, apply vacuum to hose. If idle does not change and vacuum leaks, system is okay.
  3. Increase engine speed to 3500 RPM. Apply vacuum to hose. Vacuum should leak until 3.25 in. Hg of vacuum is reached. If this occurs, system is okay.
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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.