Hey Scotty I have a 2019 Volkswagen Jetta with 63,000-64,000 miles. I took it to the Volkswagen dealer to get a tune up after I put a new air filter in because my car started to jerk when I accelerated past 40mph. It stilled jerked after I got a mile away so I took it back. They said they added some fluids and the I had carbon build up. Then after I took it back they said the 3 cylinder was misfiring. The jerking stopped but I can tell my engine hasn’t drove the same. Especially when I first start the car and my engine takes a while to shift into the next gear. But after a min or two it’s ok. I was changing my oil every 3,000-6,000 miles when I got the car at 32,000 miles. And only my recent oil change was after 10,000-11,000 miles before the car started shaking. What should I do? I hope that my friend scan tool can give me more information when I see him.
What should I do?
Scan for codes and data. Stop going to the dealer and find a good local mechanic. (Also stay away from chains like Pep Boys, Midas, and Firestone.)
You can get a decent scanner under $100, or check Scottys garage at amazon: https://www.amazon.com/shop/scottykilmer/list/2XW7WGTYW92WE?ref_=aip_sf_list_spv_ofs_mixed_d
Dealership is just going to continue guessing with your money. Get some info from the cars computer and start there.
Note: The carbon cleaning probably wasn't a bad idea, its *recommended every 60k (roughly) for GDI engines.
a proper cleaning though. All they did was dump in some additive which I doubt will do much.
Okay I took the added fluids and addressing the carbon build up as separate things. I assumed they did a proper carbon cleaning by walnut blasting or whatever VW's procedure is.
Agreed additives would do almost nothing.
I guess that's something for OP to look into, what exactly they did about the carbon build up.
Please see our FAQ on the main page, and read the article about misfiring. That should give you some background, and basics to check. If that doesn't help then come back and let us know the scan results.
