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Old 09-06-2015, 08:40 PM   #1
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Losing air

it started a few days ago... after a day driving, parked and slept. woke up in the morning, noticed the passenger-side rear corner having lowered by an inch while 3 other corners were at the same height... guessing the passenger-rear airbag is leaking.

but couldn't it be leaking from the rubber bag self as if it is, it wouldn't keep that corner in the right height when in "travel" mode. could be a valve? or hose connection? anything else to look at?
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Old 09-06-2015, 08:52 PM   #2
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Your compressor will keep it inflated to ride height while engine is running (unless the leak is bad). What do your air gauges read after sitting all night? Get it to ride height and shut off but don't dump air. Check the leaking bag for air escaping. Spray fittings with soapy water. Might just be a loose fitting.
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Old 09-06-2015, 09:47 PM   #3
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Quote:
Originally Posted by adamfolger View Post
Your compressor will keep it inflated to ride height while engine is running (unless the leak is bad). What do your air gauges read after sitting all night? Get it to ride height and shut off but don't dump air. Check the leaking bag for air escaping. Spray fittings with soapy water. Might just be a loose fitting.
thanks for the fast response!! just ran the engine and brought the air up to 125psi, i will check the pressure tomorrow morning at 7:40 after exactly 12 hours. i will update...
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Old 09-07-2015, 09:35 AM   #4
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after 12 hours, it dropped to 80psi from 125psi. too fast, isn't it?
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Old 09-07-2015, 10:08 AM   #5
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The bag is likely fine.

Ride height valve is first spot to check.

Locate yours then spray soapy water on it.

Also listen.

Start engine and let it come to ride height.

Shut engine off and get close and listen for hissing.

We posted years ago about how to repair ours so it could be simple adjustment or cleaning of valve.

You can search our old posts for instructions but be sure to have good jack stands before following any instructiins.
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Old 09-07-2015, 10:27 AM   #6
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thanks toni!! i saw your post at here Leaking Air Bag & windshield washer pump not working. i will focus on the valve and the fittings...
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Old 09-07-2015, 10:44 AM   #7
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2x on checking fittings!

We had a RR air issue - slow to raise and didn't raise one time. Intermittent issue - not always happened. I was thinking air compressor.

Was doing engine work (thermostats/hoses/belts) and was cleaning off road grease and gunk underneath. Had a Schrader valve and piping "fall off in my hand" while wiping it off.

It was "T"ed into the air suspension piping right at the air pressure/filter setup. Wasn't sure what it was until I cleaned it off and searched the number on the fitting. (it was black and non-descript when it fell off in my hand). Turned out to be an air check valve. I made sure everything was working and reinstalled, snugly.

Air issues went away. Suspension pumped up quicker than before.


The "valve" after cleaning.
Reinstalled in piping.
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Old 09-07-2015, 10:55 AM   #8
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remember to use jack stands while under the bus the air is the only thing holding it up!
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Old 09-07-2015, 10:03 PM   #9
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thank you all for the wealth of info. hopefully i will get this nailed when i get back home. cheers.
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