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miakaiser5

Impala Jerking Acceleration Misfire

My 2020 Chevrolet Impala with a gasoline engine is running roughly, the check engine light is on, and it's jerking when accelerating with reduced power. Mileage is 249084 km. Could this be combustion misfires from a defective injector?

Summary of the thread

A 2020 Chevrolet Impala is experiencing rough running, a check engine light, and jerking during acceleration, possibly due to combustion misfires. The issue is suspected to be caused by a defective fuel injector. It is recommended to have the vehicle diagnosed at a workshop to confirm the problem and identify the specific injector causing the issue. The workshop confirmed the defective injector, leading to a repair.

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4 comment(s)

max_miller1

Sounds like you might be spot on with the misfire idea. I had similar symptoms a while back – rough idle, check engine light. Have you checked for any specific error codes? It could also be fuel pump related, but the jerking makes me think it's more likely a fuel injector issue.

miakaiser5 (community.author)

Were your symptoms also present under acceleration, specifically the jerking? Did you attempt any troubleshooting steps yourself before addressing the matter?

max_miller1

Yeah, the jerking was definitely there, especially when trying to get up to speed. I tried cleaning the MAF sensor and checking the spark plugs, but nothing really fixed it. Honestly, I'd suggest getting it diagnosed properly at a workshop. They can pinpoint which injector is causing the problem.

miakaiser5 (community.author)

I took the car to a workshop, and, as suspected, they found a defective fuel injector. The total repair cost was 515€. Thanks for your assistance.

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CHEVROLET

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IMPALA