Yes but I had all air line blown up on my Schrader valves for 5 days and there was no drop in the ride heights, as I was waiting for a full set of seals from Rimmer Brother's,so I know it's not the main air bag lines. If the feeder pipe is leaking would that make only the back to drop, I would have thought all would drop.,
Didn't realise only the rears dropping. Is it on the flat? Does it drop with the delay relay removed?