Air suspension

SNGAL6

MEMBER
2006 LINCOLN NAVIGATOR
143,000 MILES

My front passenger air suspension is going all the way down after about an hour or more after being turned off. It stays up when driving. I have replaced the air compressor and the truck was running great then it happened again and I replaced the relay and it was working great and then one morning it got cold and woke up the front passenger side all the way down and I was worried it would not come up but it does. Stays up while driving and after I turn it off for a few hours then it goes all the way down.

1 Reply

CARADIODOC

MECHANIC
33,873 POSTS

The fact the air bags pump back up proves the compressor and relay were working, so there is no point in replacing them. The system has a leak that is allowing the pressure to bleed off. While driving, the lower ride height will turn the compressor on and keep the system at the correct height.

The place to start is by listening underneath in a quiet area to try to find the leak. In most cases the leak is too small for that, so the more effective method is to spray the air springs and hoses with a soapy water solution. The hoses themselves do not cause much trouble. Look closer at their connections, then at the springs.