I ordered 4 new ford plugs last night, they arrived today and cost me
The 1.8 doesn't have a maf but it has a map sensor which I have cleaned. Might have to give it another clean. I'm still thinking if I should get genuine Ford plugs and see what happens but at something like £40 they aren't cheap.
My mate can't do the pcm update for two weeks so might wait till then and see I'd that cures it. I might reduce the other Bosch plugs I have to 1mm and try them.
I have thought about a terraclean as I've heard good things from it.
I'll let you guys know if I get any improvements.
I ordered 4 ford spark plugs last night and cost me less then a tenner for the lot. i purchased them off the tc harrison website, i think in store they charge £6 per plug as my invoice had discounts on it. Worth a punt for a tenner