ive got a three door with a new engine t34 greens etc its been fine but all of a sudden its produced a miss fire at about 5500- 6000 has anyone got any ideas,please help! so far ive changed the plugs and checked the leads

 

Are the leads 909 items

Matt

 

sorry mate how do i no there 909' s or not?

 

Spencer,

909's are Blue and say Motorsport and the finis number ends in 909.

 

sorry mate no there not, could this be good or bad?

 

What plugs? What gap?

 

Check the condition of the wires on the phase sensor. Unclip dizy cap and look inside. The wires perish over time and can cause mis-fires. It was the last thing i checked on my sapph after replacing plugs etc and of course this is what my mis-fire was!!!!