1999 Lincoln Navigator Repair and Maintenance
A guide to problems, costs, maintenance and repair for your 1999 Lincoln Navigator
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1999 Lincoln Navigator ProblemsCheck Engine Light Due to a PCV System Vacuum Leak
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.
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.
1999 Lincoln Navigator Questionsdid i mess up my engine?? (1 answer)
Engine light came on, i ignored it cause last time it was a sensor something simple. we also recently changed the oil. my truck was running hard so i checked all my fluids and no oil. my oil gauges were normal but nothing on dip stick i put one oil in and ran it, it ran fine picked up speed like ...
it was manufactured in August of 1999 I'm not sure if it has a heater control valve but my heat just blows out cold air only
I took it in and had the radiator flushed It didn't help at all The mechanic is trying to tell me to flush it again I'm wondering if it could be the thermostat or the heater core Help!