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  #1  
Old 25th-September-2009, 19:21
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Join Date: Sep 2009
Location: Manila, Philippines
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Default Td4 Vacuum Diagram

Hi to all!

Im trying to figure out what the route of each vacuum pipe go to and from. I took off the acoustic cover of the engine and found that there is a loose vacuum pipe with filter from the turbo side and the T-joint along the vacuum line from the reservoir has been blanked off by a screw. Also, are there vent pipes located behind the air cleaner assy just behind the mafam? I dont know if the two should be joined together but I just want to make sure I install everything right before costing me something big.


Here are the pix of the existing vacuum line:

1. I intentionally removed the vacuum hose to the EGR and blanked it off and cleaned the whole intake system w/c was full of gu, got the idea from the forum and the effect was pretty good.




2. When I opened the acoustic cover, I saw this filter attached to one of the vacuum hose from the turbo, there was no hose attached to the other end of the filter. I only attached a hose on the other end just recently.
(pic 1)



....and from the other side on the vacuum line, the T-Joint was blanked off. I only attached a hose just recently. (pic 2)



....what I did was to connect the hose from Pic 1 (filter end) to pic 2 (t-joint). Is this right? I noticed when I attached the two, I could hear the turbo spool better, the revs go up faster, 0-120km/h was faster but I couldn't pass the 120km/h mark, is there a speed limiter? Am I missing a vacuum line? Is this related to the valve depression limiter filter problem?

3. Lastly, I want to ask if these are breather pipes or vacuum lines?




Thank you very much!!!

Last edited by cyberfarmer; 25th-September-2009 at 19:22. Reason: forgot to say thanks!!!
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  #2  
Old 25th-September-2009, 20:25
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Default Re: Td4 Vacuum Diagram

The pipe with the filter on is an atmospheric vent for the solenoid that operates the VVT. It is intentionally open at one end so you need to remove the hose you have fitted.

The tee connection on the main vacuum pipe on the right hand side of the engine bay is the vacuum supply pipe for the EGR solenoid. It will have been disconnected and blanked to disable EGR operation. The fact that you have joined this to the vent filter will be stopping the turbo vanes from operating properly and so could be causing the speed limitation.

If the turbo is not spooling up its solenoid may not be operating correctly.
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Old 26th-September-2009, 04:03
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Default Re: Td4 Vacuum Diagram

Chaser,

Thanks for the reply, so what i'll do now is to remove the hose from the filter, and block off the T-pipe, right?
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Old 26th-September-2009, 11:28
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Default Re: Td4 Vacuum Diagram

Yes block the branch of the tee as it was before. It will have been like that to prevent EGR operation so removing the hose from the EGR actuator on the valve was unnecessary in your case. You should still have benefited from cleaning it though.

Also the vent filter in your pic looks rather old so it should be renewed.
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Old 27th-September-2009, 19:35
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Default Re: Td4 Vacuum Diagram

Quote:
Originally Posted by Chaser View Post
The pipe with the filter on is an atmospheric vent for the solenoid that operates the VVT. It is intentionally open at one end so you need to remove the hose you have fitted.

The tee connection on the main vacuum pipe on the right hand side of the engine bay is the vacuum supply pipe for the EGR solenoid. It will have been disconnected and blanked to disable EGR operation. The fact that you have joined this to the vent filter will be stopping the turbo vanes from operating properly and so could be causing the speed limitation.

If the turbo is not spooling up its solenoid may not be operating correctly.

Hi Chaser,
When standing in front of the engine, if the left hand rubber pipe leaving the T-connection (pic. 3 in opening post) is the vacuum supply for the EGR solenoid it should be enough, in order to avoid the spindown noise with a blocked EGR-pipe, to block that pipe on top of the engine off rather than go look underneath the inputmanifold to find the arrival on the egr-soleno´d en block it off down there ??
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Old 27th-September-2009, 20:12
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Default Re: Td4 Vacuum Diagram

Quote:
Originally Posted by willo View Post
Hi Chaser,
When standing in front of the engine, if the left hand rubber pipe leaving the T-connection (pic. 3 in opening post) is the vacuum supply for the EGR solenoid it should be enough, in order to avoid the spindown noise with a blocked EGR-pipe, to block that pipe on top of the engine off rather than go look underneath the inputmanifold to find the arrival on the egr-soleno´d en block it off down there ??
Yes that's right willo, it's just so that people have the option to disable EGR in a discreet way and have everything look as it should when the vac pipe is disconnected out of site.
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Old 27th-September-2009, 20:32
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Default Re: Td4 Vacuum Diagram

Quote:
Originally Posted by Chaser View Post
Yes that's right willo, it's just so that people have the option to disable EGR in a discreet way and have everything look as it should when the vac pipe is disconnected out of site.
Thanks and interesting. As I had this spindown noise once again last week I was thinking of taking off the undercarriage of the engine (which is a pig to do I understand), so if I now can follow that one pipe, until it's out of sight, and do something with/on it (maybe try to put a 'cap' on the T and push the leaving towards the solenoid pipe back over it?) things might be ok for me.
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Old 2nd-October-2009, 20:56
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Default Re: Td4 Vacuum Diagram

I already removed the vacuum pipe i installed. My observations are: 1. revs slow 2. no power until you reach 100. Does the actuator needs to be replaced? Thanks so much
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Old 22nd-February-2014, 14:16
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Default Re: Td4 Vacuum Diagram

Quote:
Originally Posted by cyberfarmer View Post

3. Lastly, I want to ask if these are breather pipes or vacuum lines?


[/font]
The small red circle in Pic.3 (the rigid pipe) is as far as I know a fuel tank vent. This is what i was lead to believe as I was wondering about the same stuff too.
-------
However, I have another question about the vent hoses. Why is there a hose running along the injector harness as obviously this is not the place for such item there. I base my thoughts on the fact I see the same hose on my engine is being chafed in many places , looks like as being just dropped there and not routed well and ,also, a thread (Noticed this blanked off Tee ???) which could n`t give an indisputable answer as one guy says it should be like that and other members argue on the matter. I see on the LH side of the engine when facing it without the engine cover, an empty hose clip slot (this is probably not a tech term but I believe you know what I mean). Maybe this is one spot where the vacuum hose should pass through. Any thoughts on the issue ...????

Last edited by kenny88; 22nd-February-2014 at 14:23.
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Old 22nd-February-2014, 17:49
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hd3 hd3 is offline
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Default Re: Td4 Vacuum Diagram

Quote:
The small red circle in Pic.3 (the rigid pipe) is as far as I know a fuel tank vent.
IRD breather a.f.a.i.k. ..
fuel tank vent be at rear of vehicle methinks

those hose clips ( one piece plastic thing ) in the larger red circle
one clips on to that vent pipe .. the other to the stub of the turbo vent filter ..

~~~~~~~~~~~~~~~

be some diagrams/pic here .. of the vacuum system on the td4/m47r engine :
http://www.landyzone.co.uk/lz/2536215-post15.html

Last edited by hd3; 22nd-February-2014 at 17:52.
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