Sighing noise post EGR blank!

I have fitted the EGR blank to my TD4 and now get a loud sighing noise every time I switch off the engine. I guess it's the pressure in the inlet system.
Does anyone else get this
Should it make the noise
If not how do I correct it (don't say put the EGR valve back on)
Cheers

MickB said:

I have fitted the EGR blank to my TD4 and now get a loud sighing noise every time I switch off the engine. I guess it's the pressure in the inlet system.
Does anyone else get this
Should it make the noise
If not how do I correct it (don't say put the EGR valve back on)
Cheers

Click to expand...

I got the same after I cleaned my egr valve and blocked the vacuum pipe to prevent it's operation.
It sounded like it was the egr modulator trying to pull on the egr diaphragm.
Since I was retaining the egr valve I decided to follow a tip from TDJohn to block off the exhaust connection with some metal cut from a tin can, then I was able to reconnect the vacuum hose to the diaphragm and the noise stopped.
I'm not sure if removing the modulator or disconnecting it electrically will generate a fault code.
Try disconnecting the egr modulator vacuum pipe from where it tees off from the main vacuum hose between the vacuum pump and brake servo, remembering to plug the tee to prevent loss of vac for the servo!

MickB said:

I have fitted the EGR blank to my TD4 and now get a loud sighing noise every time I switch off the engine. I guess it's the pressure in the inlet system.
Does anyone else get this
Should it make the noise
If not how do I correct it (don't say put the EGR valve back on)
Cheers

Click to expand...

did you fit a gasket ?

Can't find it now but seem to remember someone having this problem and posting a link to a recording they had made of the noise.

If anyone can find it maybe it will include a solution.

I got the same after I cleaned my egr valve and blocked the vacuum pipe to prevent it's operation.

Click to expand...

Yep got it then as well

did you fit a gasket ?

Click to expand...

Yes mate gasket fitted

beginning to think maybe got a cow stuck under the bonnet mooing everytime I stop

Wot key is it singin in ?. . . . .

MickB said:

I have fitted the EGR blank to my TD4 and now get a loud sighing noise every time I switch off the engine. I guess it's the pressure in the inlet system.
Does anyone else get this
Should it make the noise
If not how do I correct it (don't say put the EGR valve back on)
Cheers

Click to expand...

Did the EGR mod to my 2006 TD4 today. Blanked off the vacuum hose and made sure all the fitting/gaskets were clean and tight. No dash lights or odd noises, seems I was lucky. Certainly the hippo accelerates more cleanly from a standing start now, with tuning chip and MAF compensator fitted too I'm running out of tinkering options...............

S

Wot key is it singin in ?. . . . .

Click to expand...

Laaaaaa......ger

Chaser said:

Can't find it now but seem to remember someone having this problem and posting a link to a recording they had made of the noise.

If anyone can find it maybe it will include a solution.

Click to expand...

You mean this ??

http://www.landyzone.co.uk/lz/f9/unwinding-noise-34644-3.html

willo said:

You mean this ??

http://www.landyzone.co.uk/lz/f9/unwinding-noise-34644-3.html

Click to expand...

thats the one i was searching for.

mine also stopped when the egr vac pipe was refitted. (i blanked the exhaust instead) i think if it's disconnected the other side of the egr modulator/solenoid it may not happen..........'mickb' give it a try...