Can you help my mechanic fix my Focus?

Hi, my mechanic has put a new (well second hand 2007) engine into my 2006 Ford Focus but it's misfiring on one of the cylinders. He tried replacing the coil, discovered that's not the issue and is now in the process of changing out various sensors, but nothing has worked so far. He says there's not a problem with the new engine and is running out of ideas. Would you have any suggestions?

Eimead De Paor (Balbriggan)

Jul 2014 Filed under: fault

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Expert answer

Hi Eimead,

Assuming your mechanic already tried HT plug leads and the actual spark plugs the next thing to look into would be injectors.

Hope you get to the bottom of your problem

Shane O' Donoghue - Complete Car Adviser
@Shane_O_D