Whats this noise?

[kdaffy]

Hi,

I'm looking for some input from the forum about a new noise I'm hearing...

Background:
I got the APR stage 1 tune on my car last week. The tune is incredible. I'm amazed what they are able to do with just some software.

So last night, I decided to see what the tune really offered. I was at a red light, put the car in sport and on green, floored it. Car hit the redline (woops?) and there was a pause before the shift into second gear. Second to third was fine, and then I came to another red light.

Once I got going again, I noticed a weird howling/whistling noise coming from the engine on the drivers side. This noise happens under moderate to hard acceleration from about 2k-3.5k rpm and sounds like its coming from the driver's side somewhere.

I've searched and seems like it could be one of the following issues (or something else? - you tell me):
1. Its normal with the tune - not sure about this since the noise didnt occur during the five days I had the tune up until I did this
2. Turbo wastegate - ive ready this is more of a gurgling noise rather than a howl/whistle, but would appreciate input here
3. Hose is buckling under increased boost - not sure this would make a noise, but I am no expert
4. Bad turbo - i still hear the turbo, so not sure this is the case, but again, I leave it to the experts here to decide
5. Something else? Pump, compressor?

So, without further adieu, a video I took of the noise:

http://vid44.photobucket.com/albums/...psmyanfa0f.mp4

[AWDLover]

Could be your diverter valve bleeding off boost. Mine would do something similar but with a little more flutter in the whistle.

[kdaffy]

Thanks for the response! I am planning on installing the GFB DV+ when I get some time (in the next few weeks). Did the noise go away when you installed your GFB?

[AWDLover]

Thanks for the response! I am planning on installing the GFB DV+ when I get some time (in the next few weeks). Did the noise go away when you installed your GFB?

I installed the GFB DV+ before the tune. My whistle/fluttering was not as pronounced as yours though.

[Quattritude]

Yea, sounds like a boost leak

[STA4]

That's loud. Do you have any mods?

[kdaffy]

@STA4, I only have the apr stage 1 tune. I have purchased a bunch of stuff I'm going to install soon (EC hoses, high flow intercooler pipe and turbo inlet hose, 3.0 TDI IC, GFB DV+, R8 coils and new plugs). I'm hoping it will go away after I install this stuff, but I dont know...

@quattritude - thanks for the info...so if your assessment is correct, it would be more of an issue with the hoses, etc than the actual turbo right?

also, no CEL or anything...if i dont drive the car for a while (like when I'm at work) when i start it back up the noise doesnt occur until ive driven a few miles...

[Quattritude]

@STA4, I only have the apr stage 1 tune. I have purchased a bunch of stuff I'm going to install soon (EC hoses, high flow intercooler pipe and turbo inlet hose, 3.0 TDI IC, GFB DV+, R8 coils and new plugs). I'm hoping it will go away after I install this stuff, but I dont know...

@quattritude - thanks for the info...so if your assessment is correct, it would be more of an issue with the hoses, etc than the actual turbo right?

also, no CEL or anything...if i dont drive the car for a while (like when I'm at work) when i start it back up the noise doesnt occur until ive driven a few miles...

I would first go about swapping the parts that you have purchased in case its coming from any of those hoses or the DV. If it doesn't go away, at least you know you have covered those areas already and it's coming from somewhere else. All those things that you have listed are extremely straight forward to install too and it'll take you only a couple of hours and you'll find out if the leak is still there

[wabbit23]

My car makes a really pronounced whistle sound and I think I've managed to track it down to the little door thing on the side of the airbox. I guess the spring on mine wore out so it sits slightly open and allows for air to be sucked into there causing a high pitched sound. You can check yours to see if you might have the same thing going on.

[kdaffy]

thanks wabbit! hopefully this isnt some waskaly advice!

ill take a look @ the airbox door...did the noise go away once you fixed it?

[kdaffy]

so I installed all the stuff above, got an oil change, checked the airbox, did a scan with VAG COM.

VAG COM has no codes, and not pulling any errors
Airbox is fine

Noise still here. A bit more pronounced, but I was expecting that considering I have better airflow with the new components. Also, seems like the noise is coming from the front of the engine block...

What I've noticed driving some more:
- The noise only rears its ugly head between 2k and 3/3.5k rpm under moderate acceleration. Slow and steady, nothing...floor it, nothing
- I did another hard pull from a red light this morning. Car shot off the line (stage I tune still working strong it seems), but when I hit 6k rpm, the shift from first to second was rough...almost like a pause, enough to move me forward from the sudden drop off in revs and the pause before second

I am going to try to get a boost leak check this week, even though I'm not throwing any codes. Anything else I should be thinking off? Given that I have had 2 observances where, on a hard pull, the shift from first to second has been a little harsh, should i be considering something on the transmission side? Would the stage I apr tune be a culprit from changes to the transmission/shift timing? Anything other than a boost test I should consider?

Thanks in advance!

[kdaffy]

one more follow up here in case someone else can chime in, scan with VCDS produced the following:


Address 01: Engine Labels: 06H-907-115-CAB.clb
Control Module Part Number: 8K2 907 115 AL HW: 8K2 907 115 D
Component and/or Version: 2.0l R4/4V TF H12 0001
Software Coding: 010C010A190F0160
Work Shop Code: WSC 01126 444 12187
ASAM Dataset: EV_ECM20TFS0118K2907115AL 001001 (AU48)
VCID: 79F22E1EF827F0E9285-802C
1 Fault Found:

7021 - MIL Request Signal Active (Check TCM for errors too!)
P1624 00 [104] - -
Intermittent - Confirmed - Tested Since Memory Clear
Freeze Frame:
Fault Status: 00000001
Fault Priority: 6
Fault Frequency: 1
Mileage: 108067 km
Date: 2015.05.22
Time: 08:45:59


Readiness: 0000 0000

Checked TCM, and no faults were stored in the TCM.

cant find any B8 threads referencing P1624 - any thoughts?

Thanks in advance!

[STA4]

Can you take a longer video clip of the noise?

[kdaffy]

@STA4 - will do and post up once I have it.
Thanks

[kdaffy]

a couple more videos:
http://vid44.photobucket.com/albums/...ps03jawbcv.mp4
http://vid44.photobucket.com/albums/...psfbd6auuf.mp4
http://vid44.photobucket.com/albums/...pspgxoxkp9.mp4
http://vid44.photobucket.com/albums/...ps0sccom5e.mp4

are there any trasmission related pumps or otherwise that could be making this noise if they are in the process of failing?

Thanks in advance for your input.

[STA4]

Those videos don't really help, but have you checked your PCV system? Check the hose that goes from the manifold to the PCV.

[kdaffy]

what can i improve with the videos? what else do you want to see? I know it was windy, but keeping the car around 3k RPM is kinda tough while driving and holding a camera out the window.

I can make it do the noise while depressing the brake pedal and revving, but it only does it for a short amount of time, and then after a few attempts wont let me rev above 2k RPM.

I'll check that hose....where exactly is it located?

[STA4]

I would suggest having someone else film it and include some time before and after the sound. Try to shield mic from wind. Maybe secure the phone somewhere in the engine bay...?

It's shown partially disconnected in this pic:

[kdaffy]

ok cool - ill see if i can tape the phone to the engine and try to record it that way...makes me nervous thinking about it, but a good excuse for a new phone if it turns out to be a fail.

[blbroo]

ok cool - ill see if i can tape the phone to the engine and try to record it that way...makes me nervous thinking about it, but a good excuse for a new phone if it turns out to be a fail.

It gets kinda warm in there. Curious to see how this one works out.

[kdaffy]

It gets kinda warm in there. Curious to see how this one works out.

Hahaha...yeah could be a huge fail. Will be something done first thing in the morning

[kdaffy]

Quick update... My mechanic checked for leaks with a smoke test and also checked the pcv and found no problems... Havent had a chance to take better videos, but anyone have any other thoughts? Mechanic thinks its an issue with the turbo. I have 2k miles left before the extended warranty on the turbo is up but not sure the dealer will repair under the warranty since I'm not throwing any code. Really bummed about this

[B G 8er]

Might be the perfect opportunity to go K04 APR.

[o1turbo30v]

Quick update... My mechanic checked for leaks with a smoke test and also checked the pcv and found no problems... Havent had a chance to take better videos, but anyone have any other thoughts? Mechanic thinks its an issue with the turbo. I have 2k miles left before the extended warranty on the turbo is up but not sure the dealer will repair under the warranty since I'm not throwing any code. Really bummed about this

If it was the turbo you most likely would be getting an p0299 underboost code.... the dealer wouldnt replace your turbo anyway, you have no turbo related codes and you you chipped your car, meaning you are sol. This noise only showed up once you chipped it so clearly its boost related, if it runs fine, who cares, drive it.

[van462]

I would disconnect the intake manifold hose that goes to the PCV and block it off like post 18. its easy to block off for testing just a plastic bag and tape will work. See if the noise goes away, I believe you have a faulty PCV and boost pressure is getting into the block and possible out of the front main seal.

[kdaffy]

Apologies for silence for a while on this. Had a baby, was off for a few weeks.

Brought the car into the dealership. Their "master tech" checked both the turbo and PCV system and both were fine according to the tech. They are saying that my GFB DV is the issue causing the noise, since when they put back the stock one the noise went away...Not sure if I believe them, but perhaps I blew the stock DV and the GFB was installed incorrectly, but I'm having a hard time believing that the DV is the issue.

Not sure what to do from here. I'm picking my car up tomorrow. Not sure if I will put the tune back on or what else to do...

[kdaffy]

following up on this...since the GFB DV retains the stock solenoid, would an issue with the stock solenoid be causing the noise? Since I got it back from the dealer, the noise is significantly more quiet...cant hear it at times. could be because the car hasnt been driven much in the past month...

Anyone have any thoughts? Also does anyone know what the P1624 code I got initially is related to? I have searched all over and cant find anything for this code and the B8.

[kdaffy]

CEL came on last night again - havent had a chance to scan it, but I'm guessing the original fault codes are back (7021 - MIL Request Signal Active (Check TCM for errors too!) P1624 00 [104] - -)

I'm hoping its a turbo code so I can get a new one under warranty, but I think I have false hope.

On another note, havent really noticed the whistling/howling noise in the past 24hrs.

I feel like I am in bizarro land

[kdaffy]

So the saga seems to have come to an end.

My dealer replaced the turbo under warranty with my car just 20 miles shy of the 70k warranty extension. It took four trips to the dealer, them insisting it wasnt the turbo and swapping out my aftermarket hoses, DV and IC, putting in a new stock DV (after saying the OEM one I bought from ECS was not OEM), and new blowoff valve, stock coils (after saying my R8 coils dont belong on my car and that they are for the 3.0 engine and adversly affect the 2.0), and me insisting the whole time that it was they turbo. Every time they would do something they would say the noise was gone, I would go home and it would still be there. The third time I smartened up and had the tech drive with me before I left the dealer to disprove them saying that the noise was gone (which they were saying, and no the noise was not gone) and I think thats when they finally caved and told me to come back and they would work with me on the turbo. Eventually they relented and replaced under warranty, with none of the typical warranty replacement codes (P0299). The car drives great and most of all, no noise!

Also, I flashed back to stock before going starting this ordeal with the dealer and no TD1!

All in all a painful experience with all the back and forth, but persistence paid here and I got what I wanted.

All this started when I flashed to stage 1. I'm pretty hesitant about putting the tune back on the car given my experience, but with a new turbo (which I believe is what the tune mainly adjusts to increase power), should I have some peace of mind that I shouldn't have any issues going forward?

Appreciate all of you who took the time to provide thoughts and feedback.

[B44]

So the saga seems to have come to an end.

My dealer replaced the turbo under warranty with my car just 20 miles shy of the 70k warranty extension. It took four trips to the dealer, them insisting it wasnt the turbo and swapping out my aftermarket hoses, DV and IC, putting in a new stock DV (after saying the OEM one I bought from ECS was not OEM), and new blowoff valve, stock coils (after saying my R8 coils dont belong on my car and that they are for the 3.0 engine and adversly affect the 2.0), and me insisting the whole time that it was they turbo. Every time they would do something they would say the noise was gone, I would go home and it would still be there. The third time I smartened up and had the tech drive with me before I left the dealer to disprove them saying that the noise was gone (which they were saying, and no the noise was not gone) and I think thats when they finally caved and told me to come back and they would work with me on the turbo. Eventually they relented and replaced under warranty, with none of the typical warranty replacement codes (P0299). The car drives great and most of all, no noise!

Also, I flashed back to stock before going starting this ordeal with the dealer and no TD1!

All in all a painful experience with all the back and forth, but persistence paid here and I got what I wanted.

All this started when I flashed to stage 1. I'm pretty hesitant about putting the tune back on the car given my experience, but with a new turbo (which I believe is what the tune mainly adjusts to increase power), should I have some peace of mind that I shouldn't have any issues going forward?

Appreciate all of you who took the time to provide thoughts and feedback.

but the tune right away so new turbo can adapt to it and it wont have issues.

[kdaffy]

is there no break in recommendation for the new turbo? I am hesitant to put the tune back on right away...might wait a little bit, put back all my aftermarket hoses, DV and IC, see what happens, and then re-tune.

by "so new turbo can adapt" what adapting are you referring to? Getting accustomed to higher boost levels? the turbo doesnt have a computer so im not sure what type of adaptation you may be referring to...