help with miss fire

[dce73]

hi new to the forum hope someone can help
I have a 57plate 140ps rwd transit that has a miss on acceleration around 2000rpm not all the time but is now getting more frequent
it had a new prv and scv at fords last week runs a lot better but still has miss
the only code ive had had twice in last six months is p0234 turbo over boost
any suggestions on what to try next would be much appreciated
cheers
darren

[loot]

Check the crank sensor is clean

[dce73]

ok thanks will check that at weekend
hope it is as simple as that