smoky xantia 2.1td

davethewheel · Post by **davethewheel** » 15 Aug 2006, 19:23

just puchased a 2.1td xantia estate today and it's smoking a lot under accelaration and feels flat (black smoke) strange thing is i've just driven it back 200miles and with a about 20miles to go it stopped smoking and started pulling like a train and felt really good, but the last few miles it's gone flat and smoking again any ideas please

citronut · Post by **citronut** » 15 Aug 2006, 20:12

maybe its got water in the fuel
regards malcolm

deian · Post by **deian** » 15 Aug 2006, 20:17

which means it's time for a new fuel filter? hows the air filter?

KP · Post by KP » 15 Aug 2006, 20:23

Sounds like turbo exhaust side seals to me to be honest...

davethewheel · Post by **davethewheel** » 15 Aug 2006, 20:27

havn't checked the filters yet, if it was a case of dirty filters or turbo seals wouldn't it run like that all the time it did run clean for a while and then went dirty again.
just checked the air filter and its brand new so it's not that, it has a strange looking box strapped to the fuel line called a "Ecoflow Ioniser" any idea what this is?

Mandrake · Post by **Mandrake** » 15 Aug 2006, 21:09

A bogus fuel "filter" that is supposed to double your MPG and horsepower ?

Regards,
Simon

KP · Post by KP » 15 Aug 2006, 21:20

I believe said device should go in the bin!

Try without the device as it could be restricting fuel flow heavily and cause your issue.

citronut · Post by **citronut** » 15 Aug 2006, 21:35

isnt this device on the outside of the fuel line,its just some maganets is it not,if so it dose not affect the fuel supply at all,i have seen a device like that on a diesel skoda falicia
regards malcolm

deian · Post by **deian** » 15 Aug 2006, 21:37

Could it be a dirty injector(s) maybe?
When was the timing belt last changed? That drives the fuel pump, maybe the pump is out of sync in some bizare way.

davethewheel · Post by **davethewheel** » 15 Aug 2006, 22:09

just searched on google and citronut is correct the ioniser is just a device that goes on the outside of the fuel line with magnets in it so it doesn't sound like that will be affecting it, the car has service history up untill 114,000 miles and the belt was changed then the car now has 132,000 miles on it, don't think that it can be the pump that's out of sync as the did run fine for a while.

AndersDK · Post by **AndersDK** » 15 Aug 2006, 22:19

Black smoke means rich running on a diesel - like on a petrol.
No fancy problems like restricted fuelling or defective turbo or defective injectors. Just a plain over-fuelling problem.

As the over-fuelling is intermittent it could be gunked up intercooler pressure signal pipe to the fuel enricher device. This will delay the onset of fuel enrichment and also keep the enrichment on for too long.
Causing the sluggish-umphing-oozing pattern.

Dirty fuel filter will cause fuel starvation - not overfuelling to black smoke.

Finally : any modification meant to increase the fuelling may cause black smoking. This is the A1 first point of error done by most fiddlers as they think black smoke = more engine umph.
Wrong. Black smoke causes the engine to loose 30-50% power. The engine is simply turned into a sooth producing machine.

davethewheel · Post by **davethewheel** » 15 Aug 2006, 22:32

anders, were do i find the "intercooler pressure signal pipe" and is it just a case of cleaning it out ?

h2ocooler · Post by **h2ocooler** » 15 Aug 2006, 22:34

Could be a problem with the EGR valve, was looking into getting a Mitsu Delicia and that was one of the problems with them, EGR valve opens when it shouldn't or jams open, starves the engine of oxygen so the fuel can't burn properly hence the black smoke!

davethewheel · Post by **davethewheel** » 15 Aug 2006, 22:49

i'm sure i read somewere that you can disable the EGR valve but i can't find it now, or can it be serviced?

h2ocooler · Post by **h2ocooler** » 15 Aug 2006, 23:19

i know on the delicia's they used to put a plate in the manifold where the pipe to the EGR joins it, not sure if this can be done on a Xantia, you might be able to block it where it joins the inlet manifold for a test with something, least it will show you if it is the EGR valve. Will have a look in my manual in a mo and see if anything is said about them.