I have a 95 4 runner with air bags on the back. They won't air up at all I think this truck sat for a while before I bought it. Do they have seals inside them? If they have a hole is there something you can seal it up with or do I have to replace them? Don't know anything about them so any info would help. When I try to air them up you can tell the air is going in but seems like it is just leaking out as fast but can't feel it anywhere around the sides.