Hey guys, thanks for the replies. So today Ive whipped the plugs out and they all look good, checked that the cambelt hasnt jumped a tooth and that seems fine, checked voltage at the fuel pump and thats where it should be, made sure everything is connected and checked as many earths as I could find. Ive checked all hoses are fastened tight etc. The car now starts, runs and drives until it hits boost then the power drops away abruptly and in a very scary fashion! So I've parked it up as I'm out of ideas, has anyone ever seen this happen to their car? Thanks Craig