Engine 'missing' revs on acceleration.

My engine is 'missing' on acceleration, to the point it cuts out if its revved too much. Usually when I'm using round abouts or taking off at lights. It's just had the fuel pump replaced this week and some wiring. Could that have caused it? It's also on dual fuel (gas and petrol) and it seems to be missing on both. Just wondering what it could be? Thanks in advance.