1991 Mercury Capri Base, StandardFACTORY OEM SERVICE PROCEDURE

Intake Plenum: Removal

Drain radiator and remove negative battery cable. Disconnect throttle cable. Remove air duct from throttle body. Disconnect throttle position sensor/switch connector. Mark all coolant and vacuum hoses for reassembly reference and remove from throttle body. See Figure . Remove intake plenum bolts and remove intake plenum and gasket.

NOTE: To prevent dust and dirt from entering intake manifold ports, cover ports with clean cloth after removing intake plenum.
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:

  • 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.