I am getting an intermittent misfire whilst driving. Car will appear to be driving fine, but then all of a sudden will start misfiring, and I don't mean just running lumpy, it will lose the majority of power for say ten/twenty seconds, before seemingly snapping out of it and working fine. Repeat multiple times. When I say intermittent, it's to the point where it's not driveable. Pretty much can't go above 70mph without it happening, and it also happens at lower speed too. For the most part there's no warning lights on the dash or anything, but then the other day the emission light came on so plugged in and it threw up fault codes for the emission sensor and misfire detected on cylinder 2. It was due a oil/plug change and I already had the bits so quickly did that today and cleared the fault codes. First drive and it's still there, started happening again on my way back from petrol station. No warning lights on dash and no fault codes though so can't really diagnose. Probably a bit of a stab in the dark, but anyone experienced a similiar issue? The car was sat around for a while (3 months ish) so I'm a bit concerned it's fuel filter/pump related due to the fuel having sat around. Other possibilities I can think of are injectors?