I would have posted this in the Fiesta section but my Fiesta isn't any of the model listed so posted here instead!

So iv'e performed an engine swap, from a Mk6 fiesta to a MK6.5 fiesta (more below)

Got new engine in and attempting to start it and she has a real tough time starting up.

Nine times out of ten it will just die. If i leave it a while it will fire up.

When it eventually does idle its hunting and will conk out.

If i drop the clutch when it does run it will idle around 1500 RPM. When it does this it idles fine, no miss or anything but the revs still hunt.

When its attempting to fire the plugs are wet so i assume its getting fuel.

Took HT leads on and hooked up to a spar plug, jump lead from plug to battery negative and it sparks.

Swapped camshaft sensor, swapped crankshaft sensor, swapped spedo sensor. Still giving issue.

Checked continuity between engine and chassis and its earthed.

MK6 - MK6.5
I have a donor car, was scrap, that the engine came from. It has been stood for nearly a year. However its a MK6.5, face lift. I didn't realise the quantity of changes between the face lift and non face lift.

I swapped the entire interior and loom so i can have elecy windows etc. All the interior electrics work fine. And when the engine does eventually run it runs, all be it with poor idle.

So in a nutshell i checked everything i can think of and swapped everything else and a little very stumped.

Any help would be greatly appreciated. Only other thing i can think of is fuel pumps are different. Its the MK6.5 running with the MK6 fuel pump. However I'd be very supprised if they run a different pressures and really wan't to avoid having to drop tank.

Thanks.

 

Never found a solution, its scrapped. Thanks.