Shudder and Hesitation

[MrCheese]

Relays didn't help. All they can think is cam or crank sensor.

[BurrenD]

Have a look at my thread, link below.

Yes, different engine but they have a fairly similar wiring layout for many components.

2007 Golf TDI Cutting out

[MrCheese]

Thanks for the link. The garage had the car for a week. They drove it repeatedly with a code reader attached. No fault codes. They changed a couple of relays and inspected the wiring and earth connections. They have decided it isn't a sensor fault.

The best way of describing the fault is that the engine surges briefly, struggles for a bit and recovers. If I am quick enough I can dip the clutch and release the throttle as I begin to feel the surge and the revs continue to increase for a short period as if the throttle is being pressed.

The garege can only think that a track is breaking up inside the ECU. The ECU can be sent away for testing but it is unlikley to show a fault as it seems to need to be in the car under load before the fault happens.

I could have the ECU replaced at a cost of about £500. There is no guarantee that this will fix the problem. And this money is on top of the £400 I have alredy spent.

I may try and give the car a good workout over the Christmas holidays to see if I can get it to fail properly. Or I might give up and buy a different car.

Cheers,

Paul.

[micheal balbrig]

Could it possibly be oil drawn from intercooler that is allowing partial run away at times.

[MrCheese]

Sorry for my late reply. Could be. Just had to top up the oil for the first time since August. How would the oil get in via the intercooler? Can I check? Wouldn't be turbo bearings?