Got a misfire on my 2wd saff between 3750 rpm and 4250 rpm.Changed the plugs for pp8's and gapped them 28 thou' then gapped them 25 thou' but still no joy.Sometimes it doesn't do it other times it does,plugged it in to my mates crypton tuner to make sure the coil and leads etc were o.k. and seem fine.Took dis cap off to check and rotor arm but all appears fine. Car is also running a stage 1 chip,never had a misfire on it before at all in four years of ownership so this is really strange to me.Any ideas guys?

 

Check phase sensor gap and wiring and crank sensor gap, what boost is the car running?

 

The car is running 14 lbs of boost,what is the correct gaps for these sensors?Its a G registration,the mixture on tickover is 2.6% which seems right to me for a stage one conversion

 

check the ends of the leads for the plugs. if they havnt been fitted properly they will burn off. Especially on a performance engine. I go thorugh a couple of leads every month or so!

 

Checked the leads and ends before and they're all good.

 

You need to get some proper leads then