RaceOne

And I was thinking that the fuel pump was making a different noise when priming fuel but only lasted maybe 5-6 times then sounded normal again...

It's got about half a tank of 98 mixed with some octane booster.

Thanks for the help! When I say rough it's coughing and spluttering to the point where I have to try and keep the revs up or she will stall.

Hi I have a 93 gtst it's got the rb25det motor my ex girlfriend decided to be spiteful and put about a litre of water in the fuel tank. I had started it and run it for a while before a few before I worked out what she had done. I've drained all of the fuel out of the tank change fuel filter change spark plugs anything else I should be doing? As it's still running a little rough....