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Old 03-02-2012, 03:59 AM
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Exclamation Hi all I would like to know if any one could help me

Hi

we have 2001 Beetle 1.8T
it as been running just fine until two days ago.when you hit the gas the car sounds like exhaust is blowing. I have look all over the exhaust and can't find no leaks
some told me it could be by turbo
but i dont know how to check that out

Thank you
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Old 03-02-2012, 04:16 AM
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Any more details? What trans? How many miles? Are you losing power? Can you feel the turbo kick in?
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Old 03-02-2012, 11:29 AM
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Default Vacuum?

First thing, check all your vacuum lines and hoses for leaks.. loose or cracked. Check the air cleaner and check the exhaust...see if you feel pressure at end of exhaust pipe - if not,your ehaust could be collapsed inside....sounds like a jet roar when you accelerate.
vacuum....hiss
air cleaner....drone
exhaust....jet engine sound
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Old 03-02-2012, 12:41 PM
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Default Hi

sorry its. 1.8 five speed manual with 136,000 miles
also it dose feel like the turbo is not kicking in.

Thank you
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Old 03-02-2012, 03:10 PM
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Do you have a check engine light? Did you have it scanned for codes?

Could be soooo many things which are difficult to guess. As others already mentioned. Take off the plastic engine cover and take a look at all the hose connections. Those old rubber hoses do get old, brittle and will break. I would replace them all when you get the chance.

Scan the car at Autozone or other car parts place. They do it for free and let us know what the codes are.
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Old 03-02-2012, 04:12 PM
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Default Hi IndyTom

no check engine light the only light i have on is the rear spoiler
I remove the plastic cover and replaced one bad line because is had an hole in it.
but that made no difference.
Im going to buy an odb2 usb or blue tooth scanner. I did try to check it out yesterday with the go point for iphone but it keept telling it was not plugged in
Thank you all for your help on this

what odb2 scanner would you recommend
and thanks again

here is a video of the issue thank you http://youtu.be/5kVznyu-Ung

Last edited by Gjwizz; 03-02-2012 at 05:03 PM.. Reason: add video of problem
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Old 03-02-2012, 05:15 PM
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I bet it is the vacuum line going into your Diverter Valve.

It is crimped on with one of those one time use metal clamps.
Just remove it and replace the vacuum hose to the Diverter Valve. No need to replace the clamp. I have my silicone hose just plugged in without clamp. You can use a zip tie if it makes you feel better.

Also check all the connections going into your TIP (Turbo inlet pipe). Perhaps one of them have gotten loose.
Also check the N75 valve connections.

Good Luck!

Best scanner is a Ross Tech Vag Com. VCDS software. Specially made for VW/Audi/Skoda/SEAT type of cars.

For simple scanning you can get this little gadget. Nice to have and displays up to 4 gauges at the time:

UltraGauge Automotive Information Center and OBDII Scan Tool
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Old 03-02-2012, 06:56 PM
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Default vacuum

It might be your vacuum check valve. They are plastic and usually break down with the engine heat. I had two go out in my beetle. they look like this pix here, just don't order them at the dealer for $50. order them online for $5.00. good luck
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Old 03-02-2012, 09:37 PM
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FIVE Dollars? Where did you find check valves for $5.00 Dollars?? Are you sure you weren't at Subway

The cheapest I could find them at ECS tuning was about $12.95 a piece.

Volkswagen New Beetle 1.8T > Search > Check Valve > ES#259630 In-Line Check Valve - 058905291K

Okay, I did find some for $4.99 at O'Reily's but those things look a bit on the cheap side

http://www.oreillyauto.com/site/c/de...0284&ppt=C0142

After a few more searches I did indeed find a OEM Looking Check Valve for $3.00 a piece.

http://www.hansautoparts.com/0589052...heckValve.aspx

Last edited by IndyTom; 03-02-2012 at 09:54 PM..
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Old 03-02-2012, 09:47 PM
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Quote:
Originally Posted by Gjwizz View Post
no check engine light the only light i have on is the rear spoiler
I remove the plastic cover and replaced one bad line because is had an hole in it.
but that made no difference.
Im going to buy an odb2 usb or blue tooth scanner. I did try to check it out yesterday with the go point for iphone but it keept telling it was not plugged in
Thank you all for your help on this

what odb2 scanner would you recommend
and thanks again

here is a video of the issue thank you 2001 VW Beetle GLS strange noise - YouTube
Nice Video. All those old cloth braided vacuum hoses are subject to possible failure. Those have been on that car for over 10 years and with the heat from the engine and with time they all have to be dry rotted inside and probably leak from all sides. I would systematically replace all of them just to put your mind at ease.

Definitely check the hose going to the top of your diverter valve. If that hose is leaking than you would have boost issues. The diverter valve has two larger hoses going into it and one regular small size vacuum line leading to the top of the valve. Replace that hose and see what happens. Actually replace all those OLD hoses and you will safe yourself major headaches in the future.

The last couple of seconds of the video points right at the Diverter valve and it definitely looks like that hose on top at the metal connector has seen better days.
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Old 03-02-2012, 11:27 PM
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Default thanks IndyTom

took the car and got it scanned today @ autozone
no check code or saved code got the all clear on that
so I'm going to replace all the old cloth braided vacuum hoses
and check the hose on the Diverter valve

thank you so much for all your help
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Old 03-03-2012, 03:29 AM
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Keep us posted on the progress. I am just curious if replacing the hoses will get rid of your hissing sounds/vacuum leak.

A Boost gauge maybe a good investment. It really should be standard equipment in any Turbocharged vehicle. It can tell you a lot in regards to vacuum as well as boost. If something is wrong it will display either too high or too low vacuum as well as Boost.

Good Luck to you!

If you haven't checked out this thread yet you may want to do so. A lot of Great info here. Also where are you located?

Newbie Welcome Kit!
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Old 03-03-2012, 01:47 PM
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Default Hi IndyTom

I will most defiantly keep you poste on the issue I'm going to be change the hoses today.
we are located Colon MI,
and thanks again
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Old 03-03-2012, 02:06 PM
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Default Good Morning Gjwizz

Good luck with swapping out the vacuum lines today!
Hope all goes well and you will be able to get rid of any vacuum leak and boost issue.

Here are some threads that might be of interest:

*important* Vacuum line information

Here is the link to Hose Techniques. I got my silicone hoses through them. They will outlast any rubber hoses on the market.
HoseTechniques Silicone Turbo Hose, Buy Direct from Manufacturer, Best Quality / Best Price - Hose Techniques established 1983 - Quality, Performance, Style

Also another problem area are the two plastic check valves. They do get brittle and break.

Here is a picture of the location of the two check valves.



You can get them here for about 3 bucks a piece. The dealer I think wants about 40 bucks a piece for them. Crazy!

$3 Engine Vacuum System Check Valve 98-05 VW New Beetle 1.8T, 03-05 VW Passat 1.8T, 02-06 Audi A4 1.8T, 08-12 Audi A5, 05-12 Audi A6, 11-12 Audi A7, 08-10 Audi A8/S8, 09-12 Audi Q5, 99-06 Audi TT 1.8T. Volkswagen
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Old 03-05-2012, 05:47 PM
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Default check valve

Quote:
Originally Posted by IndyTom View Post
FIVE Dollars? Where did you find check valves for $5.00 Dollars?? Are you sure you weren't at Subway

The cheapest I could find them at ECS tuning was about $12.95 a piece.

Volkswagen New Beetle 1.8T > Search > Check Valve > ES#259630 In-Line Check Valve - 058905291K

Okay, I did find some for $4.99 at O'Reily's but those things look a bit on the cheap side

Dorman Help! 47149 - Vacuum Check Valve | O'Reilly Auto Parts

After a few more searches I did indeed find a OEM Looking Check Valve for $3.00 a piece.

$3 Engine Vacuum System Check Valve 98-05 VW New Beetle 1.8T, 03-05 VW Passat 1.8T, 02-06 Audi A4 1.8T, 08-12 Audi A5, 05-12 Audi A6, 11-12 Audi A7, 08-10 Audi A8/S8, 09-12 Audi Q5, 99-06 Audi TT 1.8T. Volkswagen
A place online called SECARPARTS.COM and they are the real thing, not cheapo stuff. fyi you can also just patch the old check valve with jb weld and keep on trukin'. Just check it before you put it back in; it's suppose to let air through in one direction and totally restriction in the other. Good luck folks......
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Old 03-09-2012, 04:34 AM
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Cool

I ordered the 3$ part from the above link and installed one today, works and looks perfect. HOWEVER i have a question regarding the pictures... In those pictures, there are two check valves, i only have one. i have the one at the top and the hose that runs vertical in this photo, but the one on the right isnt there, and there isnt even a hose. i suppose im asking if im supposed to have one or hopefully they made models without that hose. another question would be..where does that hose that goes to the right in the photo go? but that 3$ check valve does work and was shipped and arrived within 4 days.
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Old 03-09-2012, 04:42 AM
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They probably made some changes in later years so you may only have one check valve. I wouldn't worry about it if replacing the one check valve solved your problem.

Congrats!

PS: I just checked my 2000 1.8 and it doesn't have that hose either. I bet they added that in 2003 and later 1.8's
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Old 03-12-2012, 02:54 AM
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On my 2002, should I put a check valve inline with the boost vacuum hose?

Sent from my ADR6350 using AutoGuide.com App
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Old 03-12-2012, 03:57 AM
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Quote:
Originally Posted by ghettoracer View Post
On my 2002, should I put a check valve inline with the boost vacuum hose?

Sent from my ADR6350 using AutoGuide.com App
Why on earth would you want to do that?

Short answer is: NO

Now you can put a restrictor inline with the hose going to your Boost Gauge. If your Boost gauge is irratic and the needle jumps a lot then
a restrictor (Not a Check Valve) may help smooth out the signal to the Boost Gauge. Most Boost gauge kits sold these days have a restrictor built
into the plastic "T". So yes, if your boost gauge has issues with being irratic and jumpy and your kit didn't come with a restrictor than you can
get one and put it inline leading to your Gauge.

Last edited by IndyTom; 03-12-2012 at 04:04 AM..
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Old 03-16-2012, 04:20 PM
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Default Hi all update for you

I Replaced vacuum lines with Hose Techniques. silicone hoses 3.5m
thanks for that IndyTom also replaced check valves.
after I done all that still had an issue.
so I went back to auto zone for them to do an odbII scan and found out there scanner would not communicate,
So I got Ross Tech Vag Com. VCDS as IndyTom stated it was the best one to get.
I tried to do a scan but got no communicate. I did a search and found because the new beetle as an after market stereo there could be an issue in the k-line I sorted that out. Did a scan and I pulled a code: 16795 - Secondary Air Injection System: Incorrect Flow Detected
P0411 - 35-10 - - - Intermittent
any help on this would be appreciated
Thank you
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