XANTIA HDi RUNNING ROUGH

[Huskyxantia]

Maybe its over fueling? Like a flooded petrol engine they cut out to much fuel

[Skull]

No Rothgar. I never got them from that YouTube link as that plug port is different on my Xantia -

Skull’s - diagnostic port

I didn’t want to go proding about in there…just query about the ECU memory from what Jim said and what I read in your manual ….

[Skull]

Maybe its over fueling?

Well it’s certainly not burning the fuel on at least No.4 injector…we just need to find out why

Sounds simple when I say it like that

[mickthemaverick]

Just a rewind on what we discovered the other day:
1. Whichever injector is in No 4 you get smoke
2. The injectors were getting wet showing fuel is coming through
3. If a diesel has the correct amount of fuel and compression it will fire.
4. So either fuel quantity is wrong or compression is wrong.
5. We showed that problem exists with different injectors in there.
6. Hence more likely a compression issue, or lack of.
7. Possible causes of loss of compression: Leaking valve/valves, leaking rings, hole in piston, head gasket blown, cracked head/block.
8. No other symptoms of head hasket failure so need a compression test to establish it is a compression problem followed by a head off inspection.
I think that sums it up and maybe gives some clarity?

[Skull]

Cheers for the re-cap Mick I have confirmed the Camshaft Woodruff Key is intact and timing is still correct.

I haven't checked the Crankshaft Woodruff Key yet either ....

[Huskyxantia]

This puzzle will be solved belive me . I'm wondering if any pieces of old core plug might have worked there way somewhere they shouldn't be ? Possibilities have to be considered on issues like these puzzling ones, but it will be solved, or there's another lump on ebay 1700 quid !

[Huskyxantia]

Maybe its over fueling?

Well it’s certainly not burning the fuel on at least No.4 injector…we just need to find out why

Sounds simple when I say it like that

Glow plugs ?

[Rhothgar]

Maybe its over fueling?

Well it’s certainly not burning the fuel on at least No.4 injector…we just need to find out why

Sounds simple when I say it like that

Glow plugs ?

Indeed. Is it still running rough when it’s hot? Question for OP.

The glowplugs should post-heat after ignition for a pre-determined time.

[Huskyxantia]

They do work before and after yes . Lots always say oh you don't need glow plugs , when I had an xantia a few yr ago it ran rough till I renewed the glow plugs , it once stopped dead , so I had to get someone to come help , I had a massive airlock ,the mechanic said check your glow plugs lately I said no as ive inky had the car for a week , so I tested them the following day 3 we're dead ! So I replaced them all , no rough running and it didn't cut out after that too, not saying it might be your issue with yours , but I know these citroens can so some weird stuff , come to think of it so can peugeot

[Rhothgar]

No Rothgar. I never got them from that YouTube link as that plug port is different on my Xantia -

I didn’t want to go proding about in there…just query about the ECU memory from what Jim said and what I read in your manual ….

You do have to be careful with the connector because if you spread the tangs apart too far and stress them then you can cause a problem with communication with the ECU when using Lexia. I accidentally caused a problem on mine and the only way I can currently read diagnostic codes is backpinning at the ECU connector!!!

[Skull]

Glow plugs ?

I haven't ran it up to temperature lately but it made no difference previously ... normally a good starter.

....I'm wondering if any pieces of old core plug might have worked there way somewhere they shouldn't be ?

It came out intact (I've got it somewhere) so anything entering the waterways will be minimal ...

....lump on ebay 1700 quid !

I appreciate all the suggestions and Jim and Mick's visit but .... That won't be happening

Cold weather snap coming ...

[Huskyxantia]

When I saw the price of the engine on ebay .... after i got up off the floor I still had to double check myself .

[CitroJim]

Well it’s certainly not burning the fuel on at least No.4 injector…we just need to find out why

Sounds simple when I say it like that

Glow plugs ?

Indeed. Is it still running rough when it’s hot? Question for OP.

The glowplugs should post-heat after ignition for a pre-determined time.

Glowplugs on an HDi are only needed when it's really, really cold and it'll start without them. They do post-heat but only for emissions; a duff glowplug or glowplug system will not cause the current issue directly...

Unless they're physically damaged and compression is being lost via them...

[Rhothgar]

That what I was thinking Jim.

His emissions are very bad at the moment with all the smoke hence the suggestion.

[CitroJim]

That what I was thinking Jim.

His emissions are very bad at the moment with all the smoke hence the suggestion.

No post-heat will not result in that much smoke though Roger...

Easy to check, just look for 12V on them just after a cold-start...