Unhappy A6

[Waugh-terfall]

Hi all, the Audi seems to be feeling a little under the weather at the moment, it's idling at 600rpm, the gearstick looks like it's fitting and the car wobbles from side to side. When outside, the engine is making a burbly throbbing sound rather than it's usual smooth hum. When blipping the throttle the rev counter needle jitters about, and it was very jerky at low speeds. But once going it was fine, joined the M20 near Ashford and floored it in 4th and it shot off in it's usual punchy manner. At that point the fuel needle was just about to enter the red area, but we filled it up and restarted and it was doing the same. 107mi later we're back home and when turning it off, something went 'ka-tink, ka-tink, ka-tunk'.

Does anyone have any ideas as to what might be causing the problem?
It's an 05 Audi A6 2.4 6spd on 56,000mi

Thanks in advance

[Iainwil]

Has it recently been serviced? I was told by the RAC once that the coil packs are know to get damaged when the whack them back in after a service? Could be that?

[Tame Technician]

If you are describing a misfire I would say yes coil. But if you did 107miles with a misfire you will probably be needing a CAT too. Coils are about £25 each + 0.3hrs or so to fit. CAT is about £700 and about 1.1hrs, but you might be lucky so dont panic yet.

[Waugh-terfall]

It was serviced about 1.5/2months ago now. I said to my Dad, maybe it's the coilpacks...
Pardon my ignorance, but what is a misfire like?

Thought I'd better add, not a single warning light came on

Edited by Waugh-terfall on Friday 13th March 21:12

[Waugh-terfall]

It's been off for about 3.5hrs now, just went out to try it again and it's still doing it.
Will try it again tomorrow morning, and if it persists, looks like it's a trip to Guildford Audi then...

Edited by Waugh-terfall on Friday 13th March 22:40

[Waugh-terfall]

Tempted fate, Dad started it yesterday morning and the dashboard lit up like an Xmas tree. RAC Low-loader has just taken it off to Guildford Audi who wont have a courtesy car until Wednesday... Great.

[Iainwil]

Guildford, down in my neck of the woods. Shame it's broken, as i had a coil pack go on the wifes A2 so i could have gone out with you and told you if it was or wasn't...i work in Godalming

[Waugh-terfall]

Oh right, I'm at college in Godalming, the RAC man who came to recover the car said that all 6 cylinders were firing and it definately wasn't the Coil Packs and the fault code came back as something to do with the Camshafts. It's a pain in the jackson having no courtesy car, I need mine to get to Godalming and back every day, Mum needs the Audi to get to work 3 days a week and tomorrow Dad needs it to take one of his contractors to High Wycombe to survey a new job. If it had to break, it could have at least waited another month until we got Mum's new car... Long distances and/or motorways in my car really aren't that nice... Hopefully the A6 will be back with us in full health once again on Tuesday evening or Wednesday...

Edited by Waugh-terfall on Sunday 15th March 19:45

[Iainwil]

Small world, i work at Charterhouse! Best of luck the A6, sounds expencive!

[Waugh-terfall]

Iainwil said:

Small world, i work at Charterhouse! Best of luck the A6, sounds expencive!

I used to go climbing there, fingers crossed it's just a sensor or something, but because of the design of the car it probably requires half the body off to get access!

[Waugh-terfall]

Dad had a call from the dealers today, aparantly it is the coil packs, 3 of them, so the RAC man seems to have been wrong, we'll see when we get it back tomorrow...

[Waugh-terfall]

Audi called today, they were wrong, it wasn't the Coil packs, which they insisted it was after Mr. RAC man said it wasn't... It's still in the workshop, fingers crossed ready tomorrow. Meanwhile there are 3 of us sharing 1 small car, fun fun fun!

[Waugh-terfall]

Took Dad to pick up the car today,

despite the RAC man telling them it was a faulty cam chain sensor and not coil packs they decided to change the coil packs only to find that it was not the issue, and it was in fact a faulty cam chain adjuster solenoid, they changed a faulty clutch pedal switch too and changed oil filter and flushed the engine (filters and oil 2months old) Grand total of £535.89
Dad's just a little (jokily) miffed that they've cleaned it, now the damage to the rear bumper is visible!