Hi chaps. Just wondering if anyone can give me a hand?

i had a missfire when the car hit anything over 15psi boost, so i fitted new plugs (iridiums), checked crank sensor and a new grp. a coil.

The Miss was still there, so decided to gap the plugs down to 0.5mm from 1mm. It runs so much better on boost, but now the missfire is there anything over 23-25psi, which to me indicates a weak spark maybe?

So, is there anything else i can try before i book it in for a setup with Karl Norris? I havent changed rotor arm or Cap yet (stupid i know), and im not sure if the ignition amp would change anything at all?

Cheers for any help

 

I had similar prob on mine, mine was the 909 Motorsport HT leads, after changing plugs, dizzy cap rotor arm.

 

Yeah i was thinking maybe leads, but they are the std ones and havent done many miles (although they are 20 years old!)

might try leads, rotor arm and cap first,

 

20 Year old leads, oh dear, get some nice magnecor on there, als o check live supply at coil is as it should be.
tabetha

 

are the magnecors better than these ford "motorsport" blue leads then?

i always thought magnecore were cack with a short shelf life?

 

up

 

There's nothing wrong with 909 leads, and there is nothing wrong with magnecor, there were rumours of some dodgy batches, but never come across any myself, had one these myself, it's a personal thing you won't go wrong with either.
909 leads are sold by Matt Lewis as well as loads of cossie stuff 01922 692424, top man as well.
tabetha

 

thanks mate