Air Ride will not hold pressure

HERLINCOLN

MEMBER
2003 LINCOLN NAVIGATOR
5.4L
V8
2WD
AUTOMATIC
188,000 MILES

My SUV will air up and drive fine but when parked looses air pressure on the (LR) strut within an hour. I have replaced the (LR) air strut twice since. I even swapped the LR strut with the RR strut and the left strut that lost pressure while mounted on the left, maintained pressure when mounted on the right. And vice-versa the strut that lost pressure mounted on the left maintained pressure when mounted on the right.

I speculate that there's a leak somewhere in the air suspension effecting only the LR of the vehicle.

I want to fix it but it's puzzling. Has anyone had problem before?

1 Reply

ASEMASTER6371

MECHANIC
52,797 POSTS

Good afternoon,

When you changed the strut, did you also replace the vent solenoid at the strut? That could be the cause of the bleed down.

If that is okay, then you will need to get a scan tool and monitor the action of the system to see if the module commands the vent open or closed when the car is turned off.

If all that is okay, then the line from the pump to the strut has a leak somewhere. You will need to use soapy water to find the leak.

Roy