Take the plug out wire brush it and check the gap between the arm going over the ceramic white cone if its bent in to where theres no gap adjust back out to where there is put it on the metal frame where its still plugged into the wire but not screwed into the cylinder and turn it over if you see a spark in between the metal arm and the ceramic cone..thats blue! Not white or red or yellow.. Blue! Is what you wanna see screw it back in and it should be all good. Add some octane booster uf that doesnt work and floor it few times