My 03 1.4 Fiesta developed a misfire a few days back, i assumed it was the spark plugs and i got them replaced.

coil pack, plugs and leads have been tested by the garage and all are fine but the problem persists

no check engine light or anything yet, misfire is on Cly 3

any help would be greatly appreciated!

 

I think my next step would be to check the injector and wiring if all is good a compression test

Adder

 

Had a compression test done, and cylinder 3 is low...70psi i think my mech said...