Hello again folks, I recently posted a message stating lumpy drive in fifth.

Well as it turns out its more like a mis-fire and it happens in fourth as

well. I notice it more when cruising between 50+ and 60+. Now here is

the question what could this be and what do you think is the likelyhood

of m/way breakdown. I was under the imprssion that once diesels start

the don't stop unless the engine blows up.:eek:

No seriously being new to diesels I am still getting to grips with how they

work so I don't know to much about the abbreviations etc. I guess the first

thing to look at would be the air filter, mmmmm where is this located.:confused:

This was the reason for my other post on the haynes manual, for me

pictures with the wording tell a greater story.:(

If you can understand above post and are willing to answer it would be

very much appreciated.

P.S. I have read some previous post on this matter but it all seams too

technical, remember I am a novice but willing/wanting to learn.

Cheers...

Bub....

Diesels used to be like that, and are certainly a lot more like that than petrol engines no sparks etc, but if the ECU (Engine Control Unit - a little computer that controls things, and since it is a computer may break down) decides to stop injecting fuel etc the engine will obviously stop.

On a petrol car you have to use a spark and on a disel car once the fuel is in it gets compressed and explodes wihtout any need for the electronic ignition system.

I would:

- Make sure you air filter isn't clogged.

- Give the MAF (Do a search on here for MAF cleaning) a clean, i doubt it is this, but worth a shot.

- Get the fuel filter either drained or changed.

- Check for air ingress into the fuel system, but this probably wouldn't cause the problems you are seeing.

- Use good fuel for a while see if things improve.

It won't be the glowplugs as these are not operational excep t when you first turn the engine over, so if the car starts it isn't the glows.

If the car is under warrenty get a dealer to look at it and fix it.

Low compression is also a posibility, however that would suggest engine wear, which I wouldn't expect on a relatively new car.

Does the problem happen at a certain revs, or a certain speed etc?

I will check the revs tonight on my way to work. It only happens when the

car is not under any strain like cruising. Will post tonights episode tomorrow.

Thanks for the info. CM.....

Good luck, I'm sure somebody who is a mechanic by day will be along to give you a more technical answer as my answer is just covering the off the top of the head problems rather than the in depth ones for the VAG engines.