Engine stutters?

KKAPES

MEMBER
2015 VOLKSWAGEN GTI
4 CYL
2WD
AUTOMATIC
131,000 MILES

I have a 2015 VW GTI Autobahn. For a week now, the car stutters on heavy acceleration. This happens regardless of whether the engine is cold or warm. The engine is fine if acceleration is slowly built up. But the engine would stutter/knock on heavy acceleration, ie. At freeway on-ramp, push pedal to get up to speed to merge into traffics, or when want to speed up quickly to pass.

Car had a major service (120,000) back in January 2023. Also have an oil/filter change a couple of days ago (after the stuttering started to see if would do any good).

Plugged in Ancel AD310 OBDII and drove around a bit. No codes show up in diagnostics.

1 Reply

KEN L

MASTER CERTIFIED MECHANIC
42,861 POSTS

It sounds like the engine is misfiring which may only leave pending codes. Can you please shoot a quick video with your phone so I can hear the engine misfire? That way I can tell for sure what's going on. You can upload it here with your response. I would say the spark plugs might be cracked or defective. Only did they replace the ignition coils as well? This is a must with these cars, here are the locations and how to replace the coils. Check out the images (below). Please let us know what happens.

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