Rear Air Ride Random Drops / Air Blending Door

[myrddin]

Hey guys, I have some questions... my H2 is a 2003 with the air ride in the rear. I have seen the rear drop down over night twice and am confused. I went out over this past weekend and aired up the bags full in the off road mode... I then got under with a soapy spray bottle and started to spray the bags down I spent like 30 min per side and even used my hand to soap it up and did not find any bubbles. I then (the best I could) started to spray the hose from each bag back to the compressor... No bubbles. I also sprayed the compressor where the hose connects on each side, and I didn't see anything... I checked the air stem inside where you can air up things and it was not leaking... I tried to follow the hose to the compressor and check it there and best I could tell it was also fine. The sensors look OK best I know... I think one was replaced right before I got it. But my thoughts are if it were one back sensors it would go down crooked? It does not do it all the time only twice that i noticed so far... no service air suspension on dash, and after I looked it over I left it up in off road mode all night and checked it with a tape... and it did not move a mm... I don't get it... thoughts?

Air blend door... this morning I noticed that i had cold air on one side, and hot on the other... I switched from dash to floor and to defrost and so on a few times and it seamed to even out. I can change from 60 - 90 left and right now but it may be a tad slow (hard to say I could be paranoid)... But I wonder if this was just cause it has been on cold so long and I just thought to try heat... or if this is an early sign of blend door failure.

any help would be great... I like my air ride suspension, and i know its problematic... but I want to keep it all in tact.

thanks in advance

[Easy Ed]

Back in 2006 HUMTECH made a post here http://www.elcovaforums.com/forums/s...air+suspension about "If this is an early model H-2 with A single stage compressor there is a programming update to address your concern, talk to your dealer tech and he should know about it. Likely the service consultant or service manager will not have the info."

Maybe yours hasn't had the update ?

Good luck, Ed

[myrddin]

I wonder how I would know if it was a single stage compressor, or how would I know if it had the programming?

I just came in from being under the truck for an hour; I left it at drive height and got a flash light... For the first half hour I left the truck running, I never seen it drop nor did the compressor come on... the rest of the time I had it shut down and I sprayed everything heavy... no bubbles at all that I was able to find. I took a measurement at the end and I will compare that to what the numbers are in the morning...

I don?t get it... if there is a hole it should leak all the time... not when it wants... and my thoughts are when you air it all the way up it should be more noticeable that nay due to the pressure.

Crazy...

Thoughts?

and thanks for taking the time he help a guy out...

[Easy Ed]

Here is what a dual stage looks like. http://www.amazon.com/HUMMER-COMPLETE-AIR-SUSPENSION-COMPRESSOR/dp/B003P5BP9W/ref=sr_1_1?ie=UTF8&s=automotive&qid=1276051210&sr= 8-1 As for the programming, if you can still find a HUMMER dealer (???) they should be able to run the VIN and tell what has been done to the truck, I'd think ?

Ed

P.S. I am one who elected to convert mine to coils so not to have problems with the system that kept cropping up on me.

[myrddin]

Hmmm... at a glance I do not think mine looks like that... but I will check agn tomorrow...

[Easy Ed]

The 2003 only got the dual stage if the original was replaced for a problem under warranty or for that matter even after the warranty and the owner paid for it. Also, I think it was a year or two before they came out with the dual stage.

Ed

P.S. Re-read the link and it was 2005 when they came out with it.