2008 Audi A3 2.0 TDI engine shakes during starting

[Poptest]

Hello DK, I'm working on an Audi which shakes hard during starting, and sometimes needs 3 attempts before engine starts.
There are no fault codes, and car runs pefectly, power is good. I've replaced fuel and air filter.

Some people say this problem could be related to the dual mass flywheel.

Please share your experience.

Thank you....

[Meat-Head]

Rumor states flywheel.

if open space, try starting in gear, see if makes differs ce.

does engine shake when you rev it

[Poptest]

I have to make some corrections. Audi is 2006 with automatic transmission.

engine does not shake when I rev it up.

it shakes only during start.

thank you

[geoboynwo]

sounds stupid, checked all engine mounts up and under? dmf is noisey when on its way out or the car wont start. do u get any vibrations through the car when driving?

[martij976]

I would first check mounts too. On the flat floor put gear into park and release the hand brake.
Open the hood and try push and pull car back and forward.
If mounts are gone, u'll see engine bouncing bad and even hear "thud" sound going out off the mounts.

[audivwauto]

change the duel mass flywheel

[Poptest]

Thank you for the tips. This car has two problems: 3-4 starts when parked overnight and shake while starting. Will replacing the dual mass flywheel improve starting?

thanks again

[martij976]

Thank you for the tips. This car has two problems: 3-4 starts when parked overnight and shake while starting. Will replacing the dual mass flywheel improve starting?

thanks again


I think if your convertor is this type: pic
Starter turning base of a wheel bolted to the crank shaft.
Try disconnect secondary disc mounted to the tranny?(if poss. never seen that car;))
Try start the car.
-Maybe before unbolting anything remove spark plugs and try to crank.
-Can tell a lot!

[autoden]

No spark plugs in a tdi,,, but it does have glow plus. If 2 or 3 of these have gone down and its only firing on one cylinder trying to start, then it will shake rattle n roll.
autoden

[smirnoff_rules]

if these turn over to slow ie low battery or poor starter they judder and start and cut out , needs to be fast to pump fuel , try with a battery pack on

[Poptest]

if these turn over to slow ie low battery or poor starter they judder and start and cut out , needs to be fast to pump fuel , try with a battery pack on

Cranking rpm is very good.

[Poptest]

No spark plugs in a tdi,,, but it does have glow plus. If 2 or 3 of these have gone down and its only firing on one cylinder trying to start, then it will shake rattle n roll.
autoden

Thank you for the tip autoden. Glowplug failure makes sense. I will check this........but I did not see any glowplug fault. This is why I never considered the plugs.

[super jumbe]

Thank you for the tips. Will replacing the dual mass flywheel improve starting?

Never sean Audi i2006 with automatic transmission and duel mass flywheel !! http://www.digital-kaos.co.uk/forums/images/smilies/roflmao.gif

[smokey08]

Never sean Audi i2006 with automatic transmission and duel mass flywheel !! :roflmao:

Pretty sure cars fitted with a dog shit gearbox (DSG) have them. CVT gearboxes do not.

Post the engine code and gearbox code (both on white label under carpet in the boot)

[Pardul]

cvt=multitronic have dual mass
poptest check starter
regards