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Dan
Dan, Technician
Category: Ford
Satisfied Customers: 23761
Experience:  Independent Shop Experience, 2 Year Automotive Diploma, & Access to Information Database
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2003 Ford Mustang: V6 with po303 cylinder misfire and po..revs

Resolved Question:

Have a 2003 Ford Mustang V6 with PO303 cylinder misfire and PO 316 misfire detected 1st 1000 revs what should I do? This didnt start till I filled up with gas at a station I never use
Submitted: 5 years ago.
Category: Ford
Expert:  Dan replied 5 years ago.

Welcome to JustAnswer, my name is XXXXX XXXXX I'm here to help get your problem resolved. Ask follow up questions, thanks.

This most likely means your #3 coil has failed. swap coil with another cylinder to see if misfire moves and if so replace coil. Let me know if you run into any questions, thanks.

Dan and 2 other Ford Specialists are ready to help you
Customer: replied 5 years ago.

Which Cylinder is #3

Expert:  Dan replied 5 years ago.
THe cylinder closest to firewall on passenger side of vehicle.