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Dan, Technician
Category: Mazda
Satisfied Customers: 24426
Experience:  Independent Shop Experience, 2 Year Automotive Diploma, & Access to Information Database
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Had a studder in idle and bumbing when accelerate. Rough

Customer Question

Had a studder in idle and bumbing when accelerate. Rough idle but drove with good power and no other issues. Changed my coil packs and spark plugs. Did great job perfect reassemble. Now sounds like engine has a skip, rough idle, heats up fast and won't go over 60. Had to floor it to make up a hill. Any thoughts?
Submitted: 1 year ago.
Category: Mazda
Expert:  Dan replied 1 year ago.

Hello, my name is***** sounds like you may have a clogged catalytic converter. Completely remove front oxygen sensor from exhaust "not just unplugged" and if that allows it to run better you know converter needs to be replaced. Let me know if you have more questions or if there is anything else I can do to help. Thanks.