Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSMERCURY1998MOUNTAINEER 5.0 P, AWDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 54 (ENGINE CONTROLS - REMOVE/INSTALL/OVERHAUL - 4.0L)FUEL SYSTEMUPPER INTAKE MANIFOLDREMOVAL & INSTALLATION
1998 Mercury Mountaineer 5.0 P, AWD
Removal & Installation
1998 Mercury Mountaineer 5.0 P, AWDSECTION Removal & Installation
WARNING: This page is about a different car, the 1998 Ford Ranger. However, it is still accessible from the selected car via links, so may be relevant.
- Disconnect negative battery cable. Remove air cleaner outlet tube. Disconnect accelerator and cruise control cable from throttle body. Remove accelerator cable bracket.
- Disconnect PCV and vacuum hoses from upper intake manifold and throttle body. Disconnect ignition coil electrical connector and secondary ignition wires.
- Disconnect electrical connectors from throttle position sensor, idle air control valve EVR solenoid and EGR backpressure transducer.
- Evenly loosen upper intake manifold nuts. To install, replace upper intake manifold gasket (if necessary). Install upper intake manifold bolts and tighten in sequence to specification. See Fig 1. See TORQUE SPECIFICATIONS . To complete installation, reverse removal procedure.
RENDER: 1.0x
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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.