This is commonly an Ignition Coil and engine misfire problem. On some Mazda3, Mazda6, and CX‑series models, ignition coils can fail, causing cylinder misfires, rough running, check‑engine lights, and reduced engine power.
What needs to be repaired or replaced
Our Mazda technicians use scan tools* to pinpoint which cylinders are misfiring, then inspect spark plugs, coils, and related wiring. Replacing faulty coils and spark plugs, and addressing any valve cover leaks or oil intrusion into the sparkplug tubes, typically restores smooth engine operation and performance.
*What is a scan tool? An electronic test tool that connects to the vehicle's on-board computer to check for error codes or problems stored in the vehicle's computer memory.
A persistent misfire should not be ignored; it can damage the emissions system, especially the very expensive catalytic converter, to say nothing of the massive amounts of air pollution the vehicle emits when it misfires. Let our Mazda engine repair in Ann Arbor team pinpoint the failing ignition coil or sensor and get your vehicle running smoothly again.