In early August, my mom's 2009 Passat Wagon threw its first CEL at 62,000 miles. It flashed at start up and then stayed solid. The idle was quite rough too, so I ran the code and it was a Cylinder 2 misfire. I figured it might be a spark plug so I went ahead and changed them because it was time anyway. No luck, as the cleared CEL came back on and the idle was still rough. Next, I swapped ignition coils 1 and 2 to see if the misfire switched to Cylinder 1 to confirm it was the ignition coil. Nope, still Cylinder 2. Out of ideas, I took it to the dealership and they found that it has a stuck 2nd valve. At 62,000 miles? Really? They quoted just over $1,000 to fix it with their walnut blaster, but we passed. The service writer suggested using Techron Fuel System Cleaner for a couple fill ups to see if that will fix the valve. Obviously, it didn't work and its been almost 2 months since the Passat developed this problem.
My questions are, is this common for TSI's? Is there any other way to fix this than with a walnut blaster? If no, what should we expect to pay?
If the answer is $1,000, consider this a feeler because we will just want to sell it.
FYI: We are the original owners, the oil has been changed every 10K miles with full synthetic and we always use 93 octane fuel.
I'm not quite sure what exactly your dealer is going to do with a walnut blaster... I've never heard of blasting a cylinder head with anything, for anything. May want to have somebody else take a look at it?