Misfires Under Load With V6 on Mazda MX-6

Problem overview

Vehicles with a V6 engine may develop an engine misfire under load (acceleration). This can be caused by a valve cover gasket leaking oil into a spark plug well, shorting the spark plug to the cylinder head. To repair this concern, the valve cover needs to be resealed and the spark plugs and wires should be replaced.

8 people reported this problem

2 comments

Schedule Repair

Mazda MX-6 vehicles with this problem

5 model years affected

Average mileage: 150,000 miles

(134,000 - 166,000)

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Submitted by Vehicle Owner · May 29, 2025

Published by RepairPal

Misfires Under Load With V6 on Mazda MX-6

Problem overview

Mazda MX-6 vehicles with this problem

Repairs related to this problem

Spark Plug Wire Replacement

Spark Plug Replacement

Valve Cover Gasket Replacement

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Ask our experts about your Mazda.