Xantia failed smoke test

[SwissSPEC]

I've been playing around with the pump alot recently, i think a diagnosis has been found This creates black smoke as its overfueling in order to produce more power. Gently wind it back in until the smoke is reduced.

[lazza]

HI All

just to let you know I passed the MOT with flying colours .

Putting in the Liquimoly fuel injector etc was a waste of money. Didnt really improve smoke noticeably.

However, as suggested, I loosened the "full-load adjustment screw", and lo and behold- clean as a whistle. Did keep stalling with the aircon on in low revs on the way to the test, but came out with a 0.5 m-1 opacity as compared with 11.71m-1 at the first test!! Round the corner I returned the screw to its original position- power returned

So thanks as ever for all your excellent advice! Another year to go

Cheers
Larry

[Stickyfinger]

as compared with 11.71m-1 at the first test!! Round the corner I returned the screw to its original position- power returned

So back to polluting the air that I breath and the ground I live on with Chemicals and Particulates.....I would not call that a good result and may I suggest as politely as possible that you get it correctly set so you stop poisoning me and the planet.

[lazza]

Dont worry, the rest of the year I put in mostly veggie oil, just cant do that for the MOT- it doesnt smoke on veggie oil

What do you run yours on?

[myglaren]

Why can't you run it on veg for the MOT?

[mad_at_french_cars]

Why can't you run it on veg for the MOT?

No reason at all.

[chinkostu]

Turn the wastegate aswell. Minimal smoke from mine now and it shifts

[blingosilveraway]

removing air filter on a hdi might not be a good idea as something might get sucked in and ruin the turbo!

if i was going to do this i'd try and put some kind of mesh screen over end of air intake.. needs to be fixed well as this things suck like a dyson!

[CitroJim]

removing air filter on a hdi might not be a good idea as something might get sucked in and ruin the turbo!

Removing an air filter on any engine is never a good idea - ever!

[ekjdm14]

as compared with 11.71m-1 at the first test!! Round the corner I returned the screw to its original position- power returned

So back to polluting the air that I breath and the ground I live on with Chemicals and Particulates.....I would not call that a good result and may I suggest as politely as possible that you get it correctly set so you stop poisoning me and the planet.

No offence intended, but why run a 3 litre V6 petrol Xant', in addition to two other cars, if you're overly concerned with the environment? Every car pollutes, even electric powered ones. I'm afraid it's just the nature of the beast and, in general, the more power an engine makes the more it will pollute. Also the amount of emissions an older vehicle (even an overtuned one) produces is still overtaken by the pollution caused in the making of a brand new, "environmentally friendly" vehicle.

If the environment was our only concern we'd all be on foot or pushbiking longer journeys but as we're on a car-based forum here I think it's reasonably safe to say most if not all of us derive some sort of pleasure from the driving of cars and the planet, by necessity, takes a back seat to enjoyment of our hobby especially when it comes to increasing the output of an engine. This could also be said of a lot of other hobbies, and it's also possible that some of us actively seek to offset the pollution caused by our hobby in other ways.

As I said, no offence intended by my opinion but I do feel your comments were a bit on the harsh side considering where they were posted. After all, the extra emissions from this one car are a mere drop in the ocean compared to say, badly maintained vehicles and coal fired power plants in other countries.

[white exec]

Sorry, but you really shouldn't be running the car in a state where it produces such high levels of exhaust emissions, and doing it deliberately. If it's ok for you to do this (for pleasure) then presumably it's also ok for any and everyone else to do the same - which it obviously isn't.

You do have the option of having the fuel system set up so that these excessive levels of pollution do not happen, while still getting good power output. It sounds as if you have made a mess of the settings, and gone to an unnecessary extreme, and are not concerned about it.

I have a Bosch injection system on ours too.
It's a 2.5TD, book output 130bhp, but chipped to 170ish.
It just went through its Spanish ITV test yesterday.
Smoke opacity: 0.18m-1.

Sorry, but that's the way to do it.

[Stickyfinger]

No offence taken here.~

I have no problems running a V6 petrol, a 2ltr TD a 998cc Petrol and a 3 ltr -6 (when will I do that car !) as I am regulated by the MoT tests, they all pass with room to spare.

They are minimum standards IMHO.

[CitroJim]

I have an old-school 1.9TD XUD powered Xantia. This engine dates from the early 80s and although it stinks like a paraffin lamp on initial cold start on a frosty morning I have yet to see even a hint of a puff of smoke out of it...

An HDi in my experience behaves in the same way. If it smokes there is something badly wrong...