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Discussion Starter #1
I have an A6 2.0 TDI. I have owned it for about 4 months. I purchased it from an Audi Specialist in Warwick. They currently accept no responsibility for the problem I have with the car.

The problem that remains relates the car when it idles. After a couple of miles running and sitting in traffic the car idles at about 8000 rpm, but every 2 or 3 seconds it appear to miss a beat and the car kind of wobbles?

Audi have ultrasonically cleaned the injectors and replaced the injector seals based on information received from Audi UK.

The car was returned with the same fault. Audi had it back for a further 4 days and were unable to diagnose the problem. The are no fault codes present. I've removed the Mass Air flow Meter plug and this has also made no difference.

Yesterday Audi arranged for the mobile technician to call and start from scratch.

He was at a loss!

These are the symptoms:

1. Erratic Idle - car wobble
2. Hesitate when pulling away
3. Revving the car through the range there is a problem at 1800 rpm
4. There is strange noise from the engine every 2 seconds
5. There is knocking when changing gear from 1st to 2nd

The technician did not rule out that the injectors may need to be completely replaced. However, he also felt that there may be something misaligned within the engine?????

Apologies if you see the same post on other forums, I really am at a loss and I don't know where to turn . If you can help or know of anyone else that can help I really appreciate it.

Many Thanks!

Rob
 

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The problem that remains relates the car when it idles. After a couple of miles running and sitting in traffic the car idles at about 8000 rpm, but every 2 or 3 seconds it appear to miss a beat and the car kind of wobbles?
8000 rpm? I assume you mean 800 rpm.

Except for the knocking noise I'd say it's probably not something mechanical, something like a sensor problem or boost leak. Knocking noise is possibly a mechanical problem but see if you can solve the cheaper problem first and get it running right and see if the knocking goes away.

Since they cleaned and checked the injectors these are probably not causing the problem. Hesitation and a problem revving at 1800 rpm is probably a sensor problem or boost leak causing the car to mistake fuel or air quantities.

Is the cam timing good? Is the timing belt on spot? The car changes the fuel timing itself but the cam timing is controlled by the timing belt.

What engine code is this anyways, we didn't get the TDI in Audis
 

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Discussion Starter #3
Thanks for replying so fast.

Where would I find the engine code?

Which sensor would you clean or replace first? Others have mentioned the the clutch fly wheel?
 

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The clutch/flywheel is possible but what engine/transmission do you have? What year? how many horsepower is your engine? manual or auto? These details will give better guesses.
 

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8000 rpm? That's your problem right there :D If somebody mentioned the DMF then you must have a manual. The flywheel can get loose and cause problems in timing.
 

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It could be camshaft wear. Your engine is probably pumpe duse and these engines had narrow camshaft lobes. If the camshaft lobes wear down then the valve timing is all wrong. This could produce the symptoms you have.
 

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If you think it's camshaft wear take off the valve cover and take a look - it's free and that could explain the idle and running problems.
 

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Discussion Starter #9
Dealer is now has diagnosed the problem as the Dual Mass Flywheel. The work is being carried on Tuesday at a cost of £1300.

Fingers crossed???
 

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It's possible, the sad thing is that that price isn't far off. Labor seems high but it's a dealer. They just have to remove the transmission and put it back. The flywheel is expensive. Some people put a solid flywheel replacement but it does increase noise, vibration, harshness at idle.
 

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Discussion Starter #12
Dual Mass Flywheel replaced and it's made no difference. Although the dealer insists it needed replacing?

Back to dealer and they now think it's a faulty injector (which have been cleaned). Previous owner may put petrol in the car?

What do I do about of money I've spent?

Dealer said there will be a cost to get the injector tested???????????
 

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Ouch,...demand that they pay for part of it or put the old flywheel back at their cost. The reason they insisted that it needed replacing was so that they could say that you would have had to pay for one anyways. Leave the dealer and find an independant mechanic or get your money back.
 

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What do I do about of money I've spent?

Dealer said there will be a cost to get the injector tested???????????
There's a cost for everything. Demand a partial refund since they didn't fix the problem. Call VW directly to demand satisfaction.
 

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Discussion Starter #15
Dual Mass Flywheel replaced and it's made no difference. Although the dealer insisted it needed replacing?

Back to dealer and they now think it's a faulty injector (which have been cleaned). Previous owner may put petrol in the car?

What do I do about of money I've spent?

Dealer said there will be a cost to get the injector tested???????????
 

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Demand a refund. That's total BS - they just threw parts at it and it did nothing so you shouldn't have to pay. Is there a court that you can take them to or a customer satisfaction arbitrator?
 

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Update!

Hi Guys,

This draws to a close. I returned the car on the 5th October.

The Master Technician called and told me he was convinced it was a EGR fault and he was waiting for an CD update from Audi. The update arrived on Tuesday and you guessed it! It didn't cure the fault.

Plan B - remove the injectors and send them for testing (they were cleaned 3 months ago).

On Thursday, I received conformation that one of the injectors was faulty. I agreed for it to be replaced at a reduced cost of £365. I was not changed for removal and testing. I have now spent nearly £2,000.

The Garage are fitted the injector Friday and they plan to keep the car for a further 3 days in order to carry out a comprehensive road test.

My next port of call is to initiate court proceedings against the Garage, I purchased the car from.

He has asked me for a copy of the invoices in order to consult with his insurers? I think he thought I had not carried out any work on the vehicle?
 

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Discussion Starter #20
It gets worse !!

Picked the car and paid £365 - drove it home and it's still the same in fact it might be worse! Car goes back on the 26th for the 6th time!

I will be contacting Audi UK when the car is in situ unless anyone else has any advice?
 
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