MAF Diver

Member

• Jul 14, 2024

• #1

I connected my smoke machine to the throttle body and got smoke coming out of this pipe round the back of the engine.

Specs:
- Right hand drive (Australian)
- V8 4L
- 2003 Discovery 2a (facelift)



Here's a photo of the engine bay:

 

AllanWorms

Well-Known Member

• Tuesday at 00:03

• #2

Is that your vacuum leak? That's a big pipe!

Does it go into the manifold somewhere after the throttle butterfly?

Perhaps your car used to have EGR, and it's been removed, but the pipe wasn't sealed off? Just guessing. Not many vacuum tubes are that big. I assume your brake booster is still hooked up somewhere.

 

MAF Diver

Member

• Tuesday at 04:41

• #3

AllanWorms said:

Is that your vacuum leak? That's a big pipe!

Click to expand...

One of them... fixing/fixed some others, will update that in the main thread. Don't want to say "fixed!" too soon and then have to take it back

AllanWorms said:

Does it go into the manifold somewhere after the throttle butterfly?

Perhaps your car used to have EGR, and it's been removed, but the pipe wasn't sealed off? Just guessing. Not many vacuum tubes are that big. I assume your brake booster is still hooked up somewhere.

Click to expand...

I can't really see where it goes, blocked view from all angles.

Yep, brake booster is hooked up and all good.

I don't think Australian models had EGR?

 

MAF Diver

Member

• Wednesday at 12:47

• #4

Found out this is the charcoal canister breather hose

@AllanWorms

 

AllanWorms

Well-Known Member

• Wednesday at 19:39

• #5

Weird - I'd have thought that would be a lot smaller!

Are there still other leaks? They probably should have seen that when the intake was off for the rocker covers...