Autoride suspension help

[BH1989]

I have a 2009 Yukon Denali Xl. For the past few months the Autoride compressor has been super noisy and running constantly. 2 weeks ago, I decided to replace the rear shocks with Arnott rebuilt units. After replacing the compressor was still noisy which is knew it would be, but it would run as normal and shut off quickly. Speed up to this week, old compressor stopped working. replaced with a new Dorman unit yesterday. Started the truck up, compressor kicked on as normal for 5 seconds then shut off. Drove around a bit, came home then one more time turned truck off, then back on to test and compressor kicks on for 5 seconds and turns off as normal. Later that night and today, compressor does not run at all. I have checked all fuses and continuity is good.

Here is my testing so far:
Fuses: 58, 2, and 54 are good and continuity is good.
I can power the relay from pins 86 and 85 and the relay clicks.
I have constant power on pin 30 on the relay connector
If I jump connector spots 30 and 87 the compressor runs.

Please help with any ideas I might be missing, from my testing all checks out but for some reason the compressor wont kick on at start up anymore. I also put a full load of groceries in and filled with gas last night and it does not kick on either.

Thanks for your time

 

[91RS]

Probably a junk compressor. I recommend OEM parts only or delete the system and use quality Bilstein shocks. Suspension is never a place to go cheap, it’ll ruin the entire driving experience of a vehicle.

 

[Rocket Man]

I haven’t heard anything but good reviews on the Dorman compressors, plenty of members here running them. I’ve been running Arnotts compressor for many years with zero issues. If you have access to a Tech2 you can run the tests otherwise I suggest taking it to a shop with a scanner like a Snap On Solus or Tech2 that can read suspension DTC’s. You can also pull one of the air lines off a shock, let all the air out, plug it back in and see if you just have it aired up too much and it the exhaust solenoid isn’t working. Did you rebuild the dryer?

 

[wjburken]

You probably have a shelled out compressor which is likely due to blown air bladders on your shocks which caused the compressor to tear itself up trying to inflate them.

As @Rocket Man said, Arnott makes good stuff. I would go with their AS-2708 (OEM Rebuild that maintains Auto Ride and Auto Level) or AS-2700's (Maintains Auto Level and spoofs the Auto Ride) I have used these with absolutely no issues.

As for the compressor, I don't think you would go wrong with either the Dorman or the Arnott options. Again, I have put both on the various vehicles I have had and have been happy.

Swapping these components out is about a 1hr job, if you take your time. Just remember when you are done, double check the ABS speed sensor connections that are on top of the frame rail as they like to come loose just because you were near them and will give you Service Suspension error on the dash. Arnott even puts a reminder in with their shocks telling you this.

 

[gooffeyguy]

Did you rebuild the dryer?

What's this?

 

[Rocket Man]

What's this?

Compressor dryer, it keeps moisture out of the system. My Arnott pump came with a rebuild kit for it.

 

[gooffeyguy]

Compressor dryer, it keeps moisture out of the system. My Arnott pump came with a rebuild kit for it.

Is it on the pump or part of the pump housing, or on the vehicle somewhere?

 

[Rocket Man]

Is it on the pump or part of the pump housing, or on the vehicle somewhere?

Mines an 02, might be different but it’s next to the compressor, mounted to the same housing the compressor is mounted to. I should add iirc, it’s been a few years.

 

[Rocket Man]

Arnotts replacement dryer.
https://www.arnottindustries.com/pr...803-arnott-air-dryer-with-pressure-transducer

 

[gooffeyguy]

Arnotts replacement dryer.
https://www.arnottindustries.com/pr...803-arnott-air-dryer-with-pressure-transducer

Interesting, I did not know about this!

 

[Foggy]

It looks to me that the dorman compressor assembly comes with a new air
drying incorporated into it..: dorman #949099

 

[Rocket Man]

It looks to me that the dorman compressor assembly comes with a new air
drying incorporated into it..: dorman #949099

It might, I went with Arnott and it comes with a kit to rebuild the OEM one. I see in their instructions that it mounts to the compressor itself.

 

[BH1989]

I appreciate all the reply's. The new compressor came with a new dryer. Its all part of the housing. I would like to say that the shocks were replaced first then a new compressor. all within a week or so of each other. There are no leaks in the system that I can find. The compressor runs if I bypass the relay and jump power straight to it. relay checks out ok as well.

The new compressor ran twice when I first installed it over the weekend but will not run anymore. Shocks are still full of air, but even as I add weight to the rear of vehicle the compressor remains off.

 

[Rocket Man]

I appreciate all the reply's. The new compressor came with a new dryer. Its all part of the housing. I would like to say that the shocks were replaced first then a new compressor. all within a week or so of each other. There are no leaks in the system that I can find. The compressor runs if I bypass the relay and jump power straight to it. relay checks out ok as well.

The new compressor ran twice when I first installed it over the weekend but will not run anymore. Shocks are still full of air, but even as I add weight to the rear of vehicle the compressor remains off.

It won’t run if there’s enough air already in the shocks. That’s why I suggested unhooking an air line, release the air, reattach the line and then start the truck to see if it comes on. If you keep adding air by jumping the compressor you might blow an air bladder. You are supposed to do what’s called an ALC reset and height calibration with a Tech2 after replacing the components. Most of the time you can get away without that but you might have the system confused at this point. Start over with no air in the system.

 

[Doubeleive]

you might just have a bad pump, or like Mark said it's full and the relief valve isn't functioning which still means bad pump they (come as a whole assembly), I would take it back to where you purchased it and exchange it. Or you could just have a bad relay if the old pump was running constantly it could have caused the relay to fail also.
the pump should run each time you cycle the key for a few seconds. If you listen to it closely each time you cycle the key it first releases some air then pumps up the shocks to around 20-25 psi, if the key is on and you add weight to the rear of the vehicle it should automatically pump in more air to keep the vehicle level

 

[BH1989]

So when I first installed the new pump, I could here it release air when I started it for the first time. Since then it has not cycled at all. I have only jumped power once to test the compressor. I suspect it may be a bad release valve on the new compressor. I have a replacement on the way and will swap it out when it arrives.

 

[Rocket Man]

So when I first installed the new pump, I could here it release air when I started it for the first time. Since then it has not cycled at all. I have only jumped power once to test the compressor. I suspect it may be a bad release valve on the new compressor. I have a replacement on the way and will swap it out when it arrives.

That’s why I said the exhaust solenoid might not be working in my first post so pull a hose off at the shock and release the air from the system. Removing one hose lets the air out of both shocks since they’re connected with a T. Then reconnect the hose and start the truck and see if the compressor comes on. It only takes a couple minutes to do this, and you’ll know if you need to replace the compressor due to a bad exhaust solenoid.

 

[BH1989]

you might just have a bad pump, or like Mark said it's full and the relief valve isn't functioning which still means bad pump they (come as a whole assembly), I would take it back to where you purchased it and exchange it. Or you could just have a bad relay if the old pump was running constantly it could have caused the relay to fail also.
the pump should run each time you cycle the key for a few seconds. If you listen to it closely each time you cycle the key it first releases some air then pumps up the shocks to around 20-25 psi, if the key is on and you add weight to the rear of the vehicle it should automatically pump in more air to keep the vehicle level

That’s why I said the exhaust solenoid might not be working in my first post so pull a hose off at the shock and release the air from the system. Removing one hose lets the air out of both shocks since they’re connected with a T. Then reconnect the hose and start the truck and see if the compressor comes on. It only takes a couple minutes to do this, and you’ll know if you need to replace the compressor due to a bad exhaust solenoid.

Thanks for your time. I will post back once I can test this. Hopefully tonight

 

[Joseph Garcia]

Interesting, I did not know about this!

That's what I like about this Forum. You learn something new almost every day!!

 

[Foggy]

Make sure to report back after you do what Rocket Man said to do...
I have replaced my shocks with OEM delcos... Haven't had to do anything else.
I didn't do any resets or anything.. Just installed the shocks.. They were find, but
since I was going to be towing heavy, I just wanted to make sure all was up to *****