whitelightning

Hello Focus Fanatics

I've had a look but cant find specifics for this. A little wisdom please.

(I have some knowledge but that's a dangerous thing when it comes to tinkering)

1.8 zetec petrol '99 Tplate runs like a clock until very occasionally at low revs 5th gear 45-55mph it will stutter, revs will drop and unless i dip the clutch and blip throttle it will choke and cut out.
When it does cut out it will restart right away.

So.... fuel problem-Filter- ? (i only use shell petrol not tesco ribena)

HT Leads or spark plugs, Whats a good bet to replace them with?

do these have coil packs as such? (a beggar on zee french i know)

Throttle position sensor if there is such a thing.......

Summer or winter this is an intermittant fault. full tank, 1/2 tank, empty makes no difference.

To my little ear there is a slight mis-fire but maybe im just too picky?

Any hoo any ideas please before i throw lots of queens heads at it??

Thanks