Strange sound on very low / no boost.

[Zee]

Ok guys strange one here.

Just had an engine transplanted from my old FD into a new shell, and when I\'m either coming off boost, or off it the car makes a strange almost \'fart\' like noise.

I\'ve had a look at a few threads and they mention the stock BOV not closing fully could be an issue, thing is I had that connected previously (at least I\'m 99% sure I did!)

I can grab a picture of my engine bay later and post that, just at work at the moment.

I need to get this sorted as it does sound pretty bad, unfortunately I can\'t drive everywhere on boost!
 :burnout

Cheers

[HaywardRotary]

I think you are meaning like a Moo noise?
If so it is the airpupmp,usually if there is a fliter kit it does it.
You can unplug the electrical connector Grey plug on the airpump and see if it still does it.
Regards
Carl

[JohnP]

does sound like the moo\'s..

put a small pipe/filter on it to dampen the noise

did u have an induction kit before?  the pipe in question used to re-circulate into the box, hence no noise.

mine developed it when i fitted used hks pipework, and didnt have a cap for the pipe. doh!

[Zee]

Carl: That could be it, now that you mention it I do remember a plug being disconnected previously... It was just the left as your looking at the engine IIRC.

John: I do have an induction kit mate. I had the whole engine etc put into a new shell, so I\'m thinking the lads connected all the plugs back up like Carl stated.
Is it the pipe that goes out from the BOV that you mention to put a filter onto?

Cheers

[JohnP]

hope this helps.

[Zee]

John that particular pipe is already connected :confused:

[JohnP]

i\'m pretty sure this is the "moo" pipe... have u done anything else? is the heat-proofing still on the underside of the bonnet in your new shell? may have been dampening the noise before?

other than that, sorry, bit stumped.

[Zee]

Damn was hoping I\'d pinpointed it.
Mind you the pipe could be a loose? I\'ll have to double check when I get in tonight.

Yep the new shell has heat proofing on the underside, my last car didn\'t.
No worries at all mate, cheers for all the help!

I\'m going to have a mess about later, just a nightmare as I have to be moving to hear the noise lol.

[JohnP]

this was my solution to the moo\'s.. and was an excuse to put something shiny in there..

oh, and excuse the loose red vac hoses.. bought 3mm at japfest/rockingham raceway this weekend.. and it keeps collapsing under vacuum, hence the return of the nicely stretched black one from BOV>Plenum..

[Zee]

Carl:
I\'ve circled the bit below that I think you\'re referring to.
Just unclipped there, and having driven it I can say that the noise has gone, so that\'s a good thing!
In terms of the airpump, do you suggest only to plug it in during MOT time, and leaving it off usually?



John:
This\' my setup at the moment, I REALLY need to get some more shiny bits in there. They\'re on the cards one I sell off the leftover bits from my old car

Cheers again lads.

[HaywardRotary]

Yes if you have got a cat plug it back in for MOT\'s.
Regards
Carl

[Zee]

Yes if you have got a cat plug it back in for MOT\'s.
Regards
Carl

Spot on bud, thanks for the tip :cheers

[JohnP]

shiny is always good

i could do with relocating my BOV really... but so tight for space all the time!

[Zee]

shiny is always good

i could do with relocating my BOV really... but so tight for space all the time!

Well relocation to my engine bay would free up some room for you, its a win-win situation

[JohnP]

lol, like your style zee. i\'m not sure if i\'ll be tasking u up on that tho

glad the moo\'s are sorted.

now i\'ve freed up some space with different filters, i think it\'ll be going down there somewhere when i get some more hoses