Hi guys , My daughter seized the engine on her T reg Fiesta Zetec 1.25 through lack of oil.Her previous Fiesta had already been re-engined when I was using it and is presently SORN'D in her driveway.It was started up regularly and ran with no problem. I'm getting too old for all this palaver so I got a mobile mechanic to pull out both engines and refit the good one.Now it won't start, it turns over ok and fires a couple of times then it's as if there's a misfire that almost stops it.The mechanic has double checked all the electrical connections,it's getting petrol and a spark but it's for all the world like the timing's too far advanced or even a couple of plug leads are swapped over.In other words it's firing but at the wrong time. Any ideas what could be causing it given that this engine was running the day before?