1 front and 1 rear Bag fills up when compressor comes on.

[Hotrodtech]

I have the ARC4000e 4 wheel compressor system on my F350 DRW Superduty. When I turn on the compressor, the right rear bag begins filling without me hitting the switch. The other switches work correctly when I hit them to fill the remaining bags. It's like the air is going right to the rear bag. So, I'll have 10lbs of air in three and 30 in the right rear. I have to keep filling the others to keep a balance. Once I get the front bags at 40 - 50 psi, the rears are 25 - 30 LR bag and 40 - 50 RR bag. However, when I try to release the air pressure in the right rear bag, it releases the air in the left front bag. I have an idea of what it could be but I am open to suggestions.

[britt@ridetech.com]

Is this a new install, or has it been in the truck a while?
A few things to check:

1-Make sure all your air lines are going to the correct bags. I like to fully deflate the vehicle, put air in the RF, make sure the RF pressure numbers go up, reach under the vehicle and squeeze the bag. If it's connected correctly the air spring will be very firm. If not, it'll be empty. Deflate all bags and move on to the LF. Do this for all corners.

2-The only way for air to bypass the valve is by debris stuck in the valve holding it open. Typically we'll hear about this on an initial install as a small piece of Teflon tape will get loose and become lodged in the valve plunger assembly. Most of the time a few quick inflate/deflates will blow the debris free. Once in a while you have to take the valve apart to clean it.