Poorly Citroen

[Craigc2]

I own a 2005 Citroen C2 and iv had this problem for quite a while.. It seems to run fine for a few miles and then decides to run lumpy and on acceleration there is a pause and then decides it wants to go, It will also stall on the odd occasion too.I'v tried changing the MAP Sensor over with a new one this didn't really help..

I have uprated cams but had these timed and all fitted with new veiner pullies and also had a re-map to sort the fueling out and it was all running fine..

im thinking it could just be a sensor but which one??

I have put it on the diagnostic machine before but nothing shows up as faulty.. Could the cams need re-timing? Im also thinking of changing the MAF Sensor...

Any ideas people