[tdiwick]

My 2006 PD gives off a puff of black smoke every time I start it. Otherwise no visible smoke.

Just passed 100K miles.

Any ideas?

 

[chittychittybangbang]

How long have you owned the car?

All PD give a little bit of smoke on cold starts. You could try some diesel purge to clean the nozzles. When was the timing belt last done? You could also check the cam timing and check the camshaft for wear. There are FAQ Articles on how to do these.

 

[Bambur]

Could it be a malfunctioning fuel temperature sensor G81?

 

[GreenMachine]

Leak

What about a leak in one of your hoses, upper or lower charge hose.

 

[Keithuk]

Welcome to the forum. welcometomyturbodies

Have you done a VAG.COM/VCDS scan?

A fiend of mine has a 2005 Seat Leon 1.9TDI and for the last month every time he starts up from cold it puffs out black smoke then clears. I did a scan last week and no. 2 glow plug is faulty.

Chassis Type: 1M - Seat Leon/Toledo
Scan: 01 02 03 08 15 17 19 22 35 36 37 46 56

VIN: VSSZZZ1MZ5R066474 Mileage: 93710km/58228miles
-------------------------------------------------------------------------------
Address 01: Engine Labels: 038-906-019-ARL.lbl
Part No: 038 906 019 KG
Component: 1,9l R4 EDC G000SG 5342
Coding: 00102
Shop #: WSC 06402
VCID: 66C63B2428E1
VSSZZZ1MZ5R066474 SEZ7Z0E2915847

1 Fault Found:
17056 - Cylinder 2 Glow Plug Circuit (Q11): Electrical Fault
P0672 - 35-10 - - - Intermittent
Readiness: 1 1 0 0 0

EOBD II Error Code: P0672

Fault Location:
Glow plug, cylinder 2 (Q11) - circuit malfunction

Possible Cause:
Wiring.
Poor connection.
Relay.
Glow plug control module.
Glow plug.
Engine control module (ECM).

Special Notes:
Glow plugs 101 ***Ver. 2.0***: http://forums.tdiclub.com/showthread.php?t=79819

As taken from my http://www.myturbodiesel.com/forum/f9/free-eobd-ii-error-codes-software-2919/

 

[Keithuk]

My Leon friend rang me last night he bought a set of glow plugs from a local auto electrical dealer. It took a while to get the old ones out a quarter of a turn in and out. He did a search on Seat forums and the number of users that have stripped the threads by constantly unscrewing these. When he got them all out he checked them with the new ones listed for his model and his old ones were around 8mm longer. He took them back to the shop in his partners car and they checked the numbers and they had Audi glow plugs in it so he had a set of those.

He rang to ask if I could reset the MIL light as its still on. I did a full scan and the same fault showed. Now a little tip with VCDS if you double click on the red writing in the results screen it will remove that DLC error only. After a few stop starts it appears to have cured it, only time will tell.