Chevrolet Blazer misfires in cylinders 3 and 6, fuel injectors need replacement on Chevrolet Blazer

Submitted by tahackl · Jun 23, 2025
Published by RepairPal

Problem overview

Some Chevrolet Blazer owners report experiencing misfires in cylinders 3 and 6, which can be attributed to faulty spark plugs, ignition coils, or fuel injectors. These misfires may lead to rough idling, engine performance issues during acceleration, a strong smell of gas, and decreased fuel economy. Additionally, some owners find that clogged fuel injectors contribute to fuel delivery problems, preventing proper fuel flow into the affected cylinders. The P0306 code, indicating a misfire in cylinder 6, can arise from various issues, including low fuel pressure or vacuum leaks. To resolve these issues, it is recommended that owners inspect and potentially replace spark plugs, ignition coils, and fuel injectors, while also checking for vacuum leaks to ensure proper fuel delivery.

2 people reported this problem
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Chevrolet Blazer vehicles with this problem

1 model year affected
Average mileage: 164,000 miles
(164,000 - 164,000)

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