Excess smoke on New Years Eve

Big lumps of metals and spanners.

Moderators: User administrators, Moderators

Locked
footstuck
Registered user
Posts: 189
Joined: 21 Nov 2009, 23:53
80-90 Mem No: 7622
Location: Kent Coast

Excess smoke on New Years Eve

Post by footstuck »

Half way up to London(70 Miles))on New years Eve, and traveling at maximum velocity,
we lost power from the 1Z, and started pumping out a mixture
of black and white smoke.
We crawled off the motorway within easy reach of a mates house.
By the time we arrived there we were down to 10mph.
As i had previously read Jeds post https://club8090.co.uk/forum./viewtopic. ... 7#p7563304,
I assumed that this was the answer, but it wasnt the fuel filter.

Image

This is the clean-air hose from air cleaner to Turbo intake.
As you see it has collapsed. The truck has had a new Air filter within 1500 miles, and
is fittid with a cyclone type filter box, and both were still clean.
With minimal throtle the exhaust gases were clear, and it only went into bonfire mode when applying
More throttle than the hose in its collapsed state would allow.
I have turned the filter box around on my truck, so the filter can be easily removed from the engine flap.
This has meant running the pipe up behind the air cleaner where it can't be seen.
Changing the fuel filter and checking the pump timing bolts didn't change or show anything,
I was very relieved to find this before going any further.
This does raise the question of flow rate/capacity of the filter box I'm running.
Is there a bigger Air box that is being used by anyone?
Who sells spiral wound intake hose?
Also the large neg- pressure it has taken to finaly collapse this hose, may have been preventing
maximum boost presure.


...What more power? No Thanks!

User avatar
ewenmaclean
Registered user
Posts: 293
Joined: 16 Nov 2006, 19:32
80-90 Mem No: 7306
Location: Edinburgh

Re: Excess smoke on New Years Eve

Post by ewenmaclean »

Hello,

the hose I have on my AHU (same as yours really) is basically solid plastic and came from the original car - I would suggest that what you have is an aftermarket replacement. The vw part number for the original hose is 1H0-129-654-R and bolts onto the side of the inlet manifold.

The other thing to consider looking at when you do this is the CCV valve and system - if this is blocked then you'll probably be contributing to excessive negative pressure on the inlet side of the turbo. I'm pretty sure that's not what's causing this, but if it were you would probably be seeping oil - worth checking for. Was there any oil in the downpipe you removed? What sort of intercooler do you have by the way?

Hope you find a good replacement for this hose

Ewen

footstuck
Registered user
Posts: 189
Joined: 21 Nov 2009, 23:53
80-90 Mem No: 7622
Location: Kent Coast

Re: Excess smoke on New Years Eve

Post by footstuck »

Hi Ewen,
Thanks for your thoughts, i will check the CCV.
The VAG part No. 068129623f Is on this intake pipe.
Maybe It has been fitted in error, and is a pre-filter ducting pipe.
I re-fitted it when I changed the ABL for Mtdi.
I am running a water to air intercooler.
Regards Nick
Last edited by footstuck on 04 Jan 2011, 10:14, edited 1 time in total.

User avatar
ewenmaclean
Registered user
Posts: 293
Joined: 16 Nov 2006, 19:32
80-90 Mem No: 7306
Location: Edinburgh

Re: Excess smoke on New Years Eve

Post by ewenmaclean »

Hello again,

sorry I didn't ask what turbo you had - mine's a gt15 and I have the original setup because I still have the ECU, so I need a maf sensor fitted. If yours is m-tdi I suppose you don't need all that and I'm not being much help! If I disconnect the elephant hose and put my hand on the intake pipe the suction gets pretty strong at revs so I wonder if that hose is really strong enough....

Good luck sorting it out

Ewen

Locked