Loud Knocking Xantia 1.9td Lexia fault update - SUCCESS

shaunlfc1 · Unread post by **shaunlfc1** » 21 Jul 2010, 20:15

Hi all,

My 1998 1.9TD Xantia with air con was fine until I went too leave work tonight, the engine diagnostic light comes on and stays on and the car sounds horrible, well a loud knocking noise. It seems to start and idle fine but the noise is horrendous.

I was told to change fuel filter and put in some injector cleaner, as it might be a blocked injector. I've done this but no change but I didnt run the car too long so was wandering if I've not given it enough time for the cleaner fluid to get to the injectors!

All your advice would be hugely appreciated.

Many thanks,

Shaun

Unread post by **Peter.N.** » 21 Jul 2010, 20:48

Sounds as though something has upset the pump timing. One of the injectors has a wire connected to it, check that it has not come off, otherwise the injector maybe faulty.

Unread post by **citroenxm** » 21 Jul 2010, 20:54

Thats a symptom of Slipped Timing belt, or as peter says pump timing!

If your a little DIY then check your timing Pin holes in the cam sprocket and injection sprocket and also the TDC pin hole in the Flywheel - hole behind the starter...

If its out, one of these will not line up..

Paul

shaunlfc1 · Unread post by **shaunlfc1** » 21 Jul 2010, 20:57

Thats brilliant chaps thank you..... I take it if it has jumped the only way to sort it is to take the belt off and realign everything which would mean I might as well do a cambelt change even though its not due?

What would cause the belt to jump, would seem impossible to me?

Thanks again,

Shaun

Unread post by **citroenxm** » 21 Jul 2010, 21:13

Belt tensioner problem of some sort, a shreadded Aux Belt, thats gone behind the Crank Pully...

Paul

shaunlfc1 · Unread post by **shaunlfc1** » 21 Jul 2010, 21:17

The aux belt tensioner was replaced 3 months ago as the aux belt was running slightly off the pulley, the bearing had collapsed in the pulley. It was done by a Peugeot/Citroen specialist.

I checked the belts tonight no sign of damage and they all seem to be running true!

Would it be a full cambelt change if it has jumped?

Cheers....

Unread post by **citroenxm** » 21 Jul 2010, 21:55

Safest thing to do - incase theres any damage to the Belt teeth, belts are only around the 25 quid mark...

Paul

shaunlfc1 · Unread post by **shaunlfc1** » 22 Jul 2010, 10:11

Just spoken to a Citroen specialist, apparently there is no margin for error on that engine, if the timing is out, it'll simply smash the valves up and will not run.

The fact it starts and has been driven 5 miles back from when the noise first started, would indicate the timing is fine?

Could it be the cold start mechanism stuck open?

Cheers,

Shaun

Unread post by **Dommo** » 22 Jul 2010, 10:14

It's the same engine that's used in 306s, and I know from my pug306.net forum days that being one or two teeth out is very possible. Especially on the fuel pump for example, as that doesnt affect the valve and piston timings, only the injection timings.

Unread post by **citroenxm** » 22 Jul 2010, 10:14

Sorry

Yes there is!

The belt CAN go a tooth out and be ok!
JUST

Your specialist isn't that special then..

Ive had a couple do this... I guess you should check it again

Paul

Unread post by **citroenxm** » 22 Jul 2010, 10:15

Thanks Dommo

A good back up, but you just beat me! LOL

Paul

Unread post by **Dommo** » 22 Jul 2010, 10:24

No problem

It's definately possible on the fuel pump! Which causes running like a bag (knocking)

Unread post by **Peter.N.** » 22 Jul 2010, 11:16

shaunlfc1 wrote:Just spoken to a Citroen specialist, apparently there is no margin for error on that engine, if the timing is out, it'll simply smash the valves up and will not run.

The fact it starts and has been driven 5 miles back from when the noise first started, would indicate the timing is fine?

Could it be the cold start mechanism stuck open?

Cheers,

Shaun

That is not so I'm afraid, I have on a couple of occaisions inadvertantly fitted the belt one tooth out because of not fitting a flywheel location pin, on both occaisions it was retarded and the effect was that it was difficult to start and ran rough but didn't damage anything. I'm sure if it was one tooth advanced it could give the symptoms you describe, although to be fair, the natural inclination if the belt slips is to go retarded which would make the engine quieter if anything. I still think the problem could be due to the injector with the sensor.

Is it knocking on all cylinders or just one - one knock every two revolutions?

Peter

shaunlfc1 · Unread post by **shaunlfc1** » 22 Jul 2010, 18:50

The problem has been diagnosed, its the electronic cold start part of the fuel pump. Its chucking out a error code 144 which cross referances as this part of the bosch pump.

Everything else was checked out, timing was fine so are the injectors. If any of that was at fault, it would be chucking out loads of smoke and it wouldnt run very well, which is the total opposite, no sign of smoke, starts and runs fine apart from the noise.

So thanks for everyone's input much appreciated, my next question is has anyone repaired a pump with this 144 fault? If so where did you get the part and how difficult is it to fix?

Many thanks,

Shaun

Unread post by **Peter.N.** » 22 Jul 2010, 19:24

Must be that its running over advanced then, you could try retarding the pump a little.

Your best option would be to fit a mechanical pump, would probably cost less than repairing that one.

Peter