I have a 1998 Ford Expedition and the factory rear air suspension has a leak on the passenger side. 75% of the time when i park i come back out to it like 30 minutes later and it will be completely deflated so i start it up and the compressor will air it up. Sometimes it wont leak at all until i drive it again. To me it seems like maybe theres a bad seal in it but i dont know, if it was a leak in the actual bag wouldnt it deflate all the time?

Has anyone else had or heard of this problem? And if so what was the cause?

 

I had this problem with the rear and checked all the lines and shocks with soapy water and found no leaks, I ended up getting the conversion kit from strumasters for the rear and it was easy to install and the ride was great, that was 2 years ago and now I did the front conversion also so now there is no more problems with the air.