Why won't my Focus start after an engine change?

I currently own a Ford Focus C-Max - a 2005 model with a TDCi engine. Unfortunately I destroyed the engine when I drove i to water. I got a second hand one from a 2010 C-Max and took it to my mechanic to fit. The mechanic has swapped the new engine into it, but it won't start. He told me he has swapped everything possible from the old engine but it's doing nothing. Any advice would be gratefully received.

Phil Brett (Cork)

Jan 2013 Filed under: fault

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Expert answer

Hi Phil,

That's a really tricky one. It's possibly to do with the immobiliser, as the car's keys are coded to a particular engine control unit (ECU) etc. Can your mechanic interrogate the ECU for fault codes?

Come back to us if we can help any further

Shane O' Donoghue - Complete Car Adviser
@Shane_O_D