Hi

Have a ford KA 2004 and it has a misfire problem, we have changed the coil, leads and spark plugs, fuel filter, oil filter and air filter. Exhause appears ok, anybody got any other suggestions

 

When does it misfire? All the time or just under load etc?

Do you know which cylinder it is? Take each lead off in turn and when the misfire doesn't get worse that'll be the cylinder. Check the plug to see if it's wet with fuel. If it is then I'd be doing a compression test, if not then i'd be looking at an injector / ECU issue.

 

its mainly in higher gears feels like i am constantly driving in a lower gear

sorry i'm not being very helpful am I

 

try another coil pack had this my self at work was a cheap coil pack

 

not sure if u mite have the same problem, but I have just bought a sport ka, misfire the way u are describing, and turns out its an injector...quite common on the sport ka 1.6 from what I have experienced.