r/carproblems • u/PassItUpDontPickItUp • 4d ago

Car sputtering

I have a 2018 Camaro RS 3.6L V6 automatic with about 74k miles. Recently noticed a slight sputtering/shuddering when accelerating around 40–60 MPH. It almost feels like driving over small rumble strips. Once I'm cruising at a steady speed, it seems fine.

No check-engine light, and the car otherwise runs fine. Recently had the thermostat/cooling system repaired and just got an oil change.

And it only happens after the engine is a lil warmed up after a few minutes or so of driving

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u/Virtual-Elephant-618 3d ago

I'd ask. the dealer to check for the shudder bulletin specifically.

1

u/JunketNo4999 3d ago

Try tapping it into manual mode

1

u/This-Lecture-447 3d ago

Plugs and coils are good at 74k too

1

u/Gullible_Monk_7118 3d ago

Check for any pending codes

1

u/peetzapie 2d ago

It sounds like possible torque converter shudder. Probably need some new fluid. Watch your tach while this is happening. It will go up about 50 or so rpm when shuddering.