ill give that's ago running on super but ive just filled it up with norm unleaded as it was empty but will try doing the super as soon as this has run out, How hard is it to fit a fuel pump, ive just removed the cheap air filter that was fitted and refitted the standered box but if I rev it it does a small pop or stutter if you get me ,do you recon it could be plugs and leads or coilpack ,its been fully serviced by ford since day one and its not due a sevice for another 3k I think