Synergie 1.9TD-Smoke out on boost!

[sub42]

Hi all, hope you are all keeping well.

I have now had a few weeks with the new motor, and she's a fine beast. I still can't believe that the fuel guage says just under halfway, and the ODO says 405 miles covered since the last tank fill! Mad....

Just a little problem however. When I drive it, cos the Mrs drives like a snail, I seem to get a lot of trailing smoke on boost. Now, it's not blue. It's just really, really dense. I have a TDI VW Transporter, and that weights nearly three tonnes, and has a 2.5 5 cylinder engine, and even when pulling up a nearly vertical(!) incline on full boost, it only belches a minimal amount of smoke.

I can remember my Dispatch 1.9TD, tha I owned in 1997 being a little smokey on boost, but I'm a little worried about the Synergie. I have changed the air filter, but I'm at a loss with the rest.

Any Ideas? It's a 2000 V plater, with 50k on the clock, FSH.

Or do I just need to give it a good thrashing....

Cheers, Mark.

[Peter.N.]

Could be just soot in the exhaust system, especially if it has been driven gently. If it is, it will dissapear after a few full throttle operations, if not its probably over fueling. Being turbo its unlikely to be air flow restriction or the lower manifold pressure would cut back the fuel.

[sub42]

Cheers,

It's actually going onto the motorway today! I have issued orders to give it some nonsense on the way to London Colney. Hopefully that will sort it. If not, is it a new Pump that is needed?

Cheers, Mark.

[NiSk]

Hardly the pump, more likely the injector(s).
But give it an Italian tune up first!

//NiSk

[AndersDK]

Since its running well and not too thirsty I would think its either water or engine oil - not fuel.
The engine oil would then come from the exhaust as it evapourates by the heat giving white dense smoke - rather than getting burnt in combustion where it will turn the exhaust smoke blue.

On a TD it would be a leaking turbo sealing on the hot side.

It could however also be a mal-adjusted boost enricher on the rotary pump.

[drpau]

could it also be a sticking wastegate - not giving enough boost and therefore not enough air to burn the fuel?

Cheers

Paul

[sub42]

Hmm.

Just taken it for another burn. It really is just overfuel I think. It is the typical brown diesel smoke, not oil or water. Just so much of it! I had a guy flash me tonight cos I left him sitting in a cloud of smoke!

It's not blue, so it must be overfuel right? So what will be the primary cause? It really is a peach, its so tight. It gives the full punch on boost, and I mean punch, it really goes. Maybe I'm just worrying about nothing. Tomorrow is BP Ultimate diesel day, and then a thrash up to Northampton and back.

What would I need to look for if it is my pump settings? I'm concerned it won't pass it's MOT next year!

Cheers Guys, you are a great help!

Mark.

[jeremy]

It could also be injectors - which are not atomising the fuel properly and causing incomplete combustion. A cleaner may help but if they are that bad they probably need overhauling or replacing.


On mechanical pumps you could restrict the maximum throttle opening - i don't know if there are any adjustments on yours.

[AndersDK]

With 50K on the clock I can hardly believe the engine should have any wear/deposit related problems. May be that simple the enricher setting has been fiddled with to try race the boys ...

[NiSk]

I wonder . . . there isn't a chance that a previous owner has fitted a booster box or similar performance-enhancing device??

//NiSk

[sub42]

Been giving it a real seeing to today. Guess what? After a full tank of high cetane BP Ultimate, and a can of injector cleaner, its all but sorted.

Must have been a little clogged up. This thing really flies! I think I must concur that it has been messed with. It's a quick little bus!

Thanks for all your help,

Cheers, Mark.