My understanding is that if that flap was sticking it would run like a dog and would also be difficult to start cold.

ahhh that kinda makes sence....... so when its hot that flap isnt opening all the way??

When you switch the ignition off, that valve is supposed to close to make a better engine shut down, and then when you go to start as soon as the ignition is ON the valve should open, for normal engine operation, but if it's sticking in the closed position when the engine is hot it will not allow any air into the intake so the engine will not start, then when the engine cools down the flap returns to the open position the engine can start

You could try taking the operating arm (#12 in the first picture) off and manually set the flap to full open and see if it will start ???

ahhh that kinda makes sence....... so when its hot that flap isnt opening all the way??

When you switch the ignition off, that valve is supposed to close to make a better engine shut down, and then when you go to start as soon as the ignition is ON the valve should open, for normal engine operation, but if it's sticking in the closed position when the engine is hot it will not allow any air into the intake so the engine will not start, then when the engine cools down the flap returns to the open position the engine can start

You could try taking the operating arm (#12 in the first picture) off and manually set the flap to full open and see if it will start ???

ill have a go at that tommorow!! and let u knmow the results

buy mk2, problem fixed, eric wins £10 and you win cool points.

Anti shudder valve sounds like a good shout as already suggested !

do they have a cold start like the old 1.6d engines its manual cable on old pump? just throwing it in there could be stuck open like a choke

Edited 11 June, 201214 yr by josh_gt

ahhh that kinda makes sence....... so when its hot that flap isnt opening all the way??

When you switch the ignition off, that valve is supposed to close to make a better engine shut down, and then when you go to start as soon as the ignition is ON the valve should open, for normal engine operation, but if it's sticking in the closed position when the engine is hot it will not allow any air into the intake so the engine will not start, then when the engine cools down the flap returns to the open position the engine can start

You could try taking the operating arm (#12 in the first picture) off and manually set the flap to full open and see if it will start ???

ill have a go at that tommorow!! and let u knmow the results

just tried the anit shudder valve :( and its fully open when hot :( but still refuse to fire..? any one else?

I found this on the VW/Audi forum http://www.vwaudiforum.co.uk/forum/showthr...-start-problems Basically the main ecu power control relays are suspect some cheap item made in tunisia.

Relay part no 1J0906381A £14

The poster replaced it and all was good????

When it's hot have you tried disconnecting the temp sensor and see if it starts? if it does there's mod you can do to solve this

I found this on the VW/Audi forum http://www.vwaudiforum.co.uk/forum/showthr...-start-problems Basically the main ecu power control relays are suspect some cheap item made in tunisia.

Relay part no 1J0906381A £14

The poster replaced it and all was good????

just tried my mates relay in the car still the same :(