2006 envoy denali swb, pump was running off and on at different times, sometimes I would come out in the morning it would be squatting. Now the aZZ end it way up in the air. Don't know where to start at.
NEED HELP air suspension acting weird
- Thread starter cretecrawler
- Start date
northcreek
Member
Not trying to drum up a sale, since I'm selling a new compressor unit but, sounds like a compressor failure due to the erratic nature.
The compressor is a stand alone unit (not interfaced with other systems, except for a few inputs) so everything except bags and two position sensors are in there.
The unit is not repairable except for a check valve which doesn't sound like your problem...Mike.
PS I would look at the two sensors near the bags/tires to make sure that they are still in place and both appear to be in the same relative position, the thinking is that maybe something flew-up and damaged one of them.
The compressor is a stand alone unit (not interfaced with other systems, except for a few inputs) so everything except bags and two position sensors are in there.
The unit is not repairable except for a check valve which doesn't sound like your problem...Mike.
PS I would look at the two sensors near the bags/tires to make sure that they are still in place and both appear to be in the same relative position, the thinking is that maybe something flew-up and damaged one of them.
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I was thinking it was a possibly a positioning sensor since is now stuck as high as it will go and not coming back down for almost a week
Mooseman
Moderator
northcreek
Member
But, you did originally say that it would be squatting at times which again sounds like compressor logic/valving . The only way I can see the sensors causing this fluctuation is if one is dislodged and flopping around or full of water and shorting out.
good day sir Mooseman, on an unrelated/related subject I tried to get to the manuals in your tag line and b4 it would even allow me to sign in to it, the page it went to says this "
Authorization Required
This server could not verify that you are authorized to access the document requested. Either you supplied the wrong credentials (e.g., bad password), or your browser doesn't understand how to supply the credentials required."
Have I done something wrong??
Update: I have gotten it to work, had to switch to Chrome
Authorization Required
This server could not verify that you are authorized to access the document requested. Either you supplied the wrong credentials (e.g., bad password), or your browser doesn't understand how to supply the credentials required."
Have I done something wrong??
Update: I have gotten it to work, had to switch to Chrome
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I am weighing my options here, and what would be your asking price on the compressor pump that you have
northcreek
Member
I have it listed on Ebay : https://www.ebay.com/itm/132903087920?ssPageName=STRK:MESELX:IT&_trksid=p3984.m1555.l2649
If you are interested we can discuss via PM/conversation . If you want we can deal outside of ebay with PayPal and I will have some wiggle room since I won't be paying fees to ebay.
This is just like the one in your truck, not a Dorman re-pop...Mike.
If you are interested we can discuss via PM/conversation . If you want we can deal outside of ebay with PayPal and I will have some wiggle room since I won't be paying fees to ebay.
This is just like the one in your truck, not a Dorman re-pop...Mike.
well thank you sir, unfortunately I just came back from the doctor and now the proud owner of a walking boot for Plantar Fasciitis, bone spurs, calcium deposits and degenerative arthritis in both feet so my funds just became nonexistent until I can recoup my med bills. Is there a way to release the pressure in the bags so I can cut back on the nosebleed look and lack of steering ability
northcreek
Member
Yes, you have to remove the two air lines to the bags (removed at the compressor). "The vehicle must be supported on jack stands".
The rest requires a little air line plumbing, now you must connect those removed lines to a tee, then from the tee you extend a line to an access point and attach a Schrader valve, now it can be filled via air hose to the height you want. Others have done it and there are some old posts here to support what I'm saying. Good luck with those feet....Mike.
ps after this you must "drive a stake" in the compressor, pull the connector or fuse.
The rest requires a little air line plumbing, now you must connect those removed lines to a tee, then from the tee you extend a line to an access point and attach a Schrader valve, now it can be filled via air hose to the height you want. Others have done it and there are some old posts here to support what I'm saying. Good luck with those feet....Mike.
ps after this you must "drive a stake" in the compressor, pull the connector or fuse.
When I "tee'd" mine off - I used the existing schrader valve inside the cargo area. Literally, just removed the air lines from the compressor and tee'd all three together. I do believe I ended up cutting barbs off the end of them because of the type of tee I used. $3 and about 20 minutes worth of work. 4 years now, no issues other than occasionally having to add air - but that's expected. Make sure you are supporting the entirety of the weight of the rear - there is pressure in those bags/lines.
northcreek
Member
That seems like a quick and cost effective way to do this, all for the price of a tee. Perhaps you can provide a source for the tee so the OP can get rolling on this....Mike.
thank you sir TequilaWarrior this is just what I am looking for
does anyone no the size of the air lines??
does anyone no the size of the air lines??
I believe the lines are 5/32". I just looked at my amazon & ebay order histories and didn't find anything.
I found the thread I got the idea from on the 'voy site (unfortunately) : https://forums.trailvoy.com/showthread.php?t=30513&highlight=air+suspension
They do mention some McMaster Carr part numbers - you might be able to cross-reference them to a part at your local hardware store.
I seem to remember having to deal with compression rings on the lines as the new tee fitting had compression style couplings - but this was at least 5 maybe 6 years ago(thinking back - I know I said 4 years, but I moved 4 years ago and did this well before then).
This is the part that I see listed in the thread: https://www.mcmaster.com/5779K32 - although I seem to remember mine being brass for some reason. Again, my memory is a little foggy. I know I ended up cutting my air lines after dropping the compressor and I think it was to put the compression rings & compression nuts over the lines before inserting them into the tee.
The thread also mentions using gasket maker to seal up the connections - I did NOT do that and only occasionally have to add air, most notably when there is a significant drop in temperature. My bags actually hold air better after the $5 hack job than when I had the compressor. That dang thing struggled constantly. I attribute what little "droop" I have now to leaky (relatively speaking) bags.
I'll try and crawl under and take a pic if I can tonight. I also seem to recall having left over pieces - perhaps I had to buy a multi-pack to get the Tee fittings I wanted. I'll check my toolbox and spares shelves tonight, too.
I found the thread I got the idea from on the 'voy site (unfortunately) : https://forums.trailvoy.com/showthread.php?t=30513&highlight=air+suspension
They do mention some McMaster Carr part numbers - you might be able to cross-reference them to a part at your local hardware store.
I seem to remember having to deal with compression rings on the lines as the new tee fitting had compression style couplings - but this was at least 5 maybe 6 years ago(thinking back - I know I said 4 years, but I moved 4 years ago and did this well before then).
This is the part that I see listed in the thread: https://www.mcmaster.com/5779K32 - although I seem to remember mine being brass for some reason. Again, my memory is a little foggy. I know I ended up cutting my air lines after dropping the compressor and I think it was to put the compression rings & compression nuts over the lines before inserting them into the tee.
The thread also mentions using gasket maker to seal up the connections - I did NOT do that and only occasionally have to add air, most notably when there is a significant drop in temperature. My bags actually hold air better after the $5 hack job than when I had the compressor. That dang thing struggled constantly. I attribute what little "droop" I have now to leaky (relatively speaking) bags.
I'll try and crawl under and take a pic if I can tonight. I also seem to recall having left over pieces - perhaps I had to buy a multi-pack to get the Tee fittings I wanted. I'll check my toolbox and spares shelves tonight, too.
northcreek
Member
Yes you will want something like this, you simply push the tubes in and you are all set. I don't think that you will find these at a hardware store as they are mostly used in pneumatic industrial controls.
https://www.ebay.com/itm/Tee-Push-t...h=item1c971b7af8:g:Rx4AAOSwWLBZ~7BR:rk:6:pf:0
https://www.ebay.com/itm/Tee-Push-t...h=item1c971b7af8:g:Rx4AAOSwWLBZ~7BR:rk:6:pf:0
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Apparently I used one similar to the one @northcreek just showed a picture of. I didn't find any extras on my spares shelves. Thinking back, I probably ordered it from McMaster-Carr. The ebay one above is not DOT rated (not that anyone's going to check). I think the McMaster-Carr one I got is also not DOT rated, but has a higher max PSI and larger operating temperature range. A tad cheaper, too. But still not DOT approved, FYI.
Here's a pic of it installed:
Here's a pic of it installed:
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Ok update..... got the fitting, jacked up the truck and found the connector (round rod) arm from the height sensor switch was broken off on the passenger side. Haven't looked at the driver's side yet
Moved the arm back down a little and reinstalled the fuse then the truck suspension lowered by itself. Not having any luck finding just the rod. Any ideas? Also I see in the pics on rock-auto.com that the entire assembly comes with a t-pin locking the sensor arm in one position, is this a shipping application or is that an option to install a pin to keep it in one location?
Moved the arm back down a little and reinstalled the fuse then the truck suspension lowered by itself. Not having any luck finding just the rod. Any ideas? Also I see in the pics on rock-auto.com that the entire assembly comes with a t-pin locking the sensor arm in one position, is this a shipping application or is that an option to install a pin to keep it in one location?
Mooseman
Moderator
I would imagine that T-pin is just for shipping or pre-installation. It has to be able to move with the suspension arm.
Apart from getting a whole new sensor, all I can think of is either JB Weld or finding a used one in a yard.
Apart from getting a whole new sensor, all I can think of is either JB Weld or finding a used one in a yard.
If you can't fix it or find a stock replacement, there is a guy on the TBSS forum that makes adjustable replacements. Kinda pricey though if you just want stock height. $30
You could probably make your own with some threaded rod.
https://centercrosscustoms.com/product/adjustable-linkage-rods-for-air-bags/
You could probably make your own with some threaded rod.
https://centercrosscustoms.com/product/adjustable-linkage-rods-for-air-bags/
now to add to the saga, the truck has developed a case of wandering when driving and braking. Feels like the front end is just all over the road. Any suggestions to start looking at?? I understand that this platform seems to eat sway bar bushings and end links.....
Mooseman
Moderator
Is that "t" featured on that link the exact piece, dimensions and all, that I will need? Also, this may be a really dumb question but, how and where did you reinflate the shocks to proper height?
What I did on my Avalanche was run a hose from that -T- to a air inflation nipple mounted where ever you want. Then you just take a standard tire air chuck, and inflate them as needed.
It will take a little experimenting to find which air pressure you like, a difference of a couple pounds of air can go from a soft ride, to a firm ride.
It will take a little experimenting to find which air pressure you like, a difference of a couple pounds of air can go from a soft ride, to a firm ride.
If you replace the sensor, you should re-calibrate both sensors. I made the blocks out of 2x4 and adjusted my sensors. Now the truck sits normal and not stuck in the air. Pump works occasionally but just to hold it at level.
I just replaced my sway bar links on both ends and all bushings after 10 years and 70k miles of use. My 05 97x Linear doesn't eat parts. Just replaced the original factory O2 sensors at 175k.
Also, if it's wandering or pulling to one side while braking, you might have uneven rotor or pad wear and it's time for a break job.
Brake job. Part of your problem could be sticky or unresponsive calipers. If the calipers are original to the vehicle, brand new name brand calipers can be purchased for as little as $30 each from Rock Auto online and save you the hassle of dealing with old cruddy ones or the pain of rebuilding old ones. Always use new parts when you can swing it.
