when i fitted my n75j valve ages ago my car would not run with it on, it would run but it would drive as if i was switching the ignition on and off which would'nt have been good for the engine mounts, anyway when i went to a mates garage to get the airbag light off (which came on after moving the seats to hoover the car) he had reset something that said the car was struggling for fuel obviously from when i had put the n75j valve on, so if i try the n75j valve again with a 710n does anyone think it will work?