Issue with my Focus

[Terrier_Jimlad]

Evening fellas, before running it to Ford (or any garage) I wonder if anyone could shed any light on an issue i'm having with my 2010 Focus 1.6 Sport that's just literally hit 40k mile this weekend.

After the car has warmed up, when its sat idle at a set of lights or a junction, the car feels like it's skipping a beat and the car shudders/judders slightly, felt more through the pedals and steering wheel, however the rev counter doesnt budge and there doesnt seem to be a change in the revs. It does this randomly, somtimes every 10 seconds, sometimes every 20 seconds

I've borrowed an OBDII reader off a mate and plugged it in but it's not flagging up any error codes (yet). The car was serviced in April this year (not genuine Ford), due its MOT next month.

Any starters for ten?

Thanks in advance!

 

[rodenal]

The older 1.4/1.6 engines still use a coil pack (as in one) that quite often causes idling issues and might not show up on a generic type scan but would be an easy fix.

Could also be something even simpler like ht leads or plugs if they've never been changed. Both dirt cheap for a focus.

Try forscan if you have an android device, it'll give you access to a little bit more than the more generic readers, though still nothing like all the measuring blocks and modules etc ford will have

 

[bainbridge]

I'd say Ht related too as the first point. Have the plugs been changed? Ford tend to change their spec so regapping the plugs a bit tighter might get it running properly. If is is this replace with new.plug.correctly gapped. Ht leads and coil.pack together aren't too dear if it isn't the plugs.

Dirty throttle intake was causing rough idling on my old focus but this was at over 100k not 40k.

 

[Terrier_Jimlad]

Finally got some spare time this weekend, so nipped down to ECP to grab some spark plugs, swapped them and touch wood, it seems to have sorted the issue, however looking at the plugs themselves they seem to be fine to me?

Either one was duff, or just taking off the HT leads and re-seating them or the coil pack might have sorted it.

Either way, it's sorted - for now! Yay

Cheers for the input fellas

 

[bainbridge]

Gaps look quite big, but the light chocolate dusting indicates it's running well.

Glad you got it sorted, have you gapped the new plugs to ford's most recent spec?