Engine stalling when DPF regenerating

[gavs]

From memory, I have a feeling that the dpf design adopted by VW is along the lines of what Suzuki used to do and this didn't prove to be all that successful resulting in a new DPF which if replaced out of warranty would set the owner back $5000.

At least Suzuki learns from their mistakes, tall bloody order to get VW, especially VGA that they have an issue with their product.

Off topic, good to hear they're sortin out your dsg issues nomadx, I knew that your mech unit was rooted as soon as you started describing the problems you had!

[alexaescht]

Hey alexaescht,

First off I don't own a diesel car, I love my pet-trol-lol! But thinking about your problem I would say it could have somthing to do with a pressure sensor in the DPF. Just doing some brief research on the DPF apparently it burns off the soot by either injecting fuel directly into the DPF or by increasing exhaust temperature by means of late ignition or controled misfiring. The reason I say it could be a sensor is because the sensors monitor the back pressure on the exhaust and DPF to prevent damage to the DPF, engine and exhaust from the hot explosive pressure. Also the pressure can prevent combustion exahust from exiting the cilinder which can result in poor fuel economy, staling and lack of throttle response.

Why didn't the sensor throw up a check if its damaged? I would assume its the same problem I have with my DSG (cultch solienoid sensor doent work accurately so it drops the clutch every gear). The problem is that the electronic part hasn't failed compleatly so is still making a circuit and thus not throwing up an error. This is what I have and diagnostics show nothing wrong with the garbox. I went with the vw tech for a drive and within 5mins he said that's not right and I am now due in for a mechatronics unit and new clutches because of the damage that could have been caused to them as a result.

What would I suggest? Well before my test drive I went around the area a few times and noted when it would play up at certain speeds, braking, stop start on hills etc, and during the test told him to do it that way and that's how I showed him. You may have to do a similar thing if diagnostics show nothing wrong.

Also could try going through the mountains with high revs (you know a real spirited drive) to manually clear out the DPF and see how it goes.

Thanks. I have read a few things about DPFs and most people say the most common fault is a pressure sensor that plays up. VW also said that the fuel we used was bad quality and could contribute to the problems, now we only use Shell diesel (although on Monday we had to use Woolworths-Caltex because of the Diesel shortage) and we have noticed an improvement in smoothness during normal driving, but still when the regeneration occurs, it does not do it smoothly at all. While I would love to be able to take it into a dealer and ask them to drive it to see the problem for themselves, the regen takes place rather randomly and without much warning so it is difficult.

[alexaescht]

From memory, I have a feeling that the dpf design adopted by VW is along the lines of what Suzuki used to do and this didn't prove to be all that successful resulting in a new DPF which if replaced out of warranty would set the owner back $5000.

At least Suzuki learns from their mistakes, tall bloody order to get VW, especially VGA that they have an issue with their product.

Doesn't sound that great...
Gavs, do you think taking it to another dealership would help? Trying to get Berwick VW to fix anything is like talking to a brick wall, it took them 4 seperate attempts to get the rain-sensing wipers to work when we bought the car and it turned out that they just hadn't been coded in at the factory. Not to mention the salesman said our car had Bluetooth, and when we picked up the car and found it didn't we came back to the dealer to find our salesman had been fired because he was caught speeding in a company car