1998 Lincoln Navigator Problems

RepairPal has identified the most common problems with the 1998 Lincoln Navigator as reported by actual vehicle owners. We'll tell you what the problem is and what it'll take to fix it.

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16
Known Problems

In high dust areas, problems with the EGR system are common. The filter for the EGR solenoid may plug and cause the EGR to activate when it should not; this can cause the engine to stall. The dirty filter should be replaced to correct this concern.

A vacuum leak from the PCV grommet vacuum leak can cause the Check Engine Light to illuminate. The molded rubber hose connections may crack and collapse, causing the vehicle to run roughly. A damaged PCV hose will require replacement.

Check the battery cable ends frequently for corrosion. Corrosion can easily migrate under the cable insulation and cause numerous electrical faults and drivability issues.

An illuminated Check Engine Light may be caused by an engine misfire due to water or engine coolant in the spark plug recesses.

Checking and adjusting the AC compressor clutch air gap can extend the service life of the AC compressor.

Prior to jacking or lifting a vehicle with air suspension, you must turn off the suspension switch. The switch is generally located in the trunk or on the right side of the passenger foot well.

You may be able to prevent transmission problems by servicing the transmission and inspecting the fluid every 15,000 to 30,000 miles. If the fluid is dark or burned then the transmission fluid should be changed.

Do not use air filters with oil-coated elements. They may cause premature failure of the mass air flow sensor; this is not covered under the warranty.

Due to age and possible damage during removal, it is recommended to replace  the spark plug boots when replacing the spark plugs,

Even though the manufacturer does not call for regular servicing, our technicians recommend servicing the power steering fluid regularly.

An exhaust leak may develop in front of the catalytic converter. This type of leak should be corrected as soon a possible to avoid damaging the catalytic converter.

The head gaskets are prone to oil leaks.

The lower intake manifold is plastic and may come apart completely.

Corrosion can form at the grounding points near the battery. There may be electrical faults and the engine may crank but not start.

Erratic engine coolant temperature or intermittent overheating can be caused by corrosion inside the water pump. The impeller may spin on the water pump shaft or the impeller may corrode. Either condition reduces coolant circulation resulting in engine overheating.