If it wernt bad enough my van playing up this week my mrs car has developed a small problem.

It's a 2007 focus cc with a 2.0 duratec.

Starts & runs perfect but every now & then will develop a slight misfire & hold back.

I plugged it into a mates Bosch kts200 & it showed no faults, next day it was ok but called out the AA & again found nothing.

My first thoughts was a coil pack or injector but not sure if that would cause an intermitant problem?

Any ideas?

 

Being as the weather is getting cold and damp, id say something electrical, could be leads, split in the coilpack and moisture getting in, if its intermittent it could be dodgy ht lead, coilpack, and i doubt they would show up on diagnostics where as if it was a sensor it would.. id check those first mate.

 

Yeah I'm going to give it a good once over tomorrow & hopefully I'll find what's doing it.

 

Can't find anything but gave it a full service including plugs, also topped it up with petrol & it's definatly better although still feels abit sluggish.

Ordered some Forte Advanced see if it's just a dirty injector etc.