Duramax Diesels Forum Truck of the Week
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Old 11-06-2017, 02:37 PM
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Default Loud AD2 4G

I installed a brand new ad2 4g a few months ago chasing a fuel problem. It wasn't the fix but it was a great excuse to justify the expense...

Anyway, since then it just seems LOUD. I can hear it in the cab when idling, windows up and ac fan on medium. I'm deleted and 4" straight pipe on a LMM so it isn't real quiet when it idles. Why is the damn thing so loud? With the engine off and key in the run position you can hear the pump from 20' away from the truck.

I followed the instructions and I primed the system with the stock primer bulb before running it. Still on the first set of filters on the AD too.
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Old 11-06-2017, 02:43 PM
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I can barely hear mine in the drivers seat with the door open, truck off with the key on. Something isnt right
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2017 Chevy "Sport" 2500hd CCSB ltz stocker

2006 Chevy LBZ - Deleted, 5" Magnaflow, Airdog II 165 4g.

2006 Chevy lbz LT ccsb 360,000 and counting..
5" exhaust, CAI...custom hail damage, peeling paint, etc...

2016 GMC 1500 slt 6.2ltr -wife's ride-

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  #3  
Old 11-06-2017, 02:58 PM
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Here is a short video. Key on engine off. Don't know why the image distorts.

https://www.youtube.com/watch?v=mSxDzr0P0WE
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Old 11-06-2017, 03:10 PM
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Mine isnt loud either, sometimes I have to poke my head under the truck to make sure it's on
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  #5  
Old 11-06-2017, 03:13 PM
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Well that sucks.
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  #6  
Old 11-06-2017, 03:15 PM
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Did you run a new pick up? Could be sucking air???
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Old 11-06-2017, 03:26 PM
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Quote:
Originally Posted by gmduramax View Post
Did you run a new pick up? Could be sucking air???
X2. I seen them not seal on the pickup tube outlet causing this. Pull that fitting back off. Wipe clean. Try again. Also make sure your lines are ran correct.
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Old 11-06-2017, 07:18 PM
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My buddy chased the same problem. He brought it to me asking if I could make a quiet box for it,lol. He called AD and the replacement is quiet; it was a lemon. My other buddy's got loud before they crapped out - all 4 so far. Call AD.
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Old 11-06-2017, 07:26 PM
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I'll double check that the pickup seal is good and I'll also call airdog.

How hot to the touch does your motor get? Mine was warm enough that it wasn't comfortable to touch. I could keep my hand there but it wasn't nice. It was a nice 80 degree day today.
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  #10  
Old 11-06-2017, 07:50 PM
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No offense to ad. but that's why I went with kennedy years ago my 06 has had kennedy pumps for 11 years now no problems at all have to lay on a creeper and touch them to make sure they're running they are so quiet. Sounds like you need a warranty replacement pump to address the concern if all connections are clean and tight. What's the pressure set at? If you have a gauge plumbed in?
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2002 Chevy 2500HD LB7 Duramax Summit White CCSB Grey (neutral) leather LT3 pkg OEM bra 4x4, Kennedy Twin Pump Filter Combo Kit, ISSPRO EV, PPE Boost Valve, DTS Built Allison, MikeL Cooler, ATS Billet Flexplate, DTS 3in DS IC pipe, Bill's 5in CAI (White), Big K&N, 4in to 7in black stack, Mickey Thompson Baja Claw TTC 315/75/16 on stock rims, Cognito P&I Brace kit, Sleeves, Energy Sway bar Kit, DD/Puller/Work truck



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  #11  
Old 11-06-2017, 08:13 PM
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I didn't adjust the pressure because it supposedly was set right from the get go. I do not have a gauge. Guess I need to add a gauge?
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  #12  
Old 11-06-2017, 08:41 PM
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Some are set high and low they set them at 15-18 if I recall at least that's what I remember then the and user can plumb in a gauge and set accordingly to their own psi if need be. Not saying you have a pressure issue but curious if yours is high and the pressure dead heading causing a back up in the supply and loading the pump up leading to the noise heard just something to think about may or may not be the problem could be internal to the pump motor itself. best bet is contact air dog and see what they recommend you try for proper diagnosis
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2006 Chevy 2500HD LBZ Duramax Summit White CCSB Tan (neutral) leather LT3 pkg w/sunroof OEM bra 4x4, ISSPRO EV, ATS Twin CP3's, Built Allison, Eaton E-locker front stock G80 rear, Kennedy Twin pump filter combo kit, Snow Perf Stage 2 w/m injection, 4in to 5in banks tip, HM Big K&N, Mickey Thompson Baja Claw TTC 315/75/16 on stock rims, Rancho RS9000XL, Fabtech HD TR, Cognito P&I Brace kit, DD/Puller/Work Truck



2002 Chevy 2500HD LB7 Duramax Summit White CCSB Grey (neutral) leather LT3 pkg OEM bra 4x4, Kennedy Twin Pump Filter Combo Kit, ISSPRO EV, PPE Boost Valve, DTS Built Allison, MikeL Cooler, ATS Billet Flexplate, DTS 3in DS IC pipe, Bill's 5in CAI (White), Big K&N, 4in to 7in black stack, Mickey Thompson Baja Claw TTC 315/75/16 on stock rims, Cognito P&I Brace kit, Sleeves, Energy Sway bar Kit, DD/Puller/Work truck



Special Thanks: (David) DTS, (Guy) Socal Diesel, (Nick & crew) DuramaxTuner, (Dan) PPE, (John) Kennedy Diesel, (Tony) All Season
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  #13  
Old 11-06-2017, 10:35 PM
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did you happen to fill out the warranty card?
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2017 Chevy "Sport" 2500hd CCSB ltz stocker

2006 Chevy LBZ - Deleted, 5" Magnaflow, Airdog II 165 4g.

2006 Chevy lbz LT ccsb 360,000 and counting..
5" exhaust, CAI...custom hail damage, peeling paint, etc...

2016 GMC 1500 slt 6.2ltr -wife's ride-

Sold
2016 Denali HD~tuned deleted
05 LLY CCSB~EPR compounds, cognito stuff, DDD Tuning, etc..



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  #14  
Old 11-06-2017, 10:39 PM
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It is sitting on the workbench in the pile of misc papers to deal with. Been meaning to send it in. Is that an issue?
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  #15  
Old 11-06-2017, 10:41 PM
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ya i dont know if they care about how much time has passed or not, but better get it filled out and sent in just in case you need to replace it.
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2017 Chevy "Sport" 2500hd CCSB ltz stocker

2006 Chevy LBZ - Deleted, 5" Magnaflow, Airdog II 165 4g.

2006 Chevy lbz LT ccsb 360,000 and counting..
5" exhaust, CAI...custom hail damage, peeling paint, etc...

2016 GMC 1500 slt 6.2ltr -wife's ride-

Sold
2016 Denali HD~tuned deleted
05 LLY CCSB~EPR compounds, cognito stuff, DDD Tuning, etc..



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