my mates evo 4 has developed a miss fire, it started off as just a little miss, nothing much but it has got progressively worse over a couple of days.

Is there a common fault on these? anything he should look out for? we've got some new spark plugs coming for it.

 

coil packs pack up mate very common

roughly £50 each from your local dealer

 

is there any way of testing them?

 

not that I know of

I was warned about this on the MLR as its a well known problem, when I did get a misfire this is what I changed first and it cured the misfire

 

cheers for the info,

he's got colder rated plugs coming, if that doesn't cure it I'll tell him to try the coil packs.

 

Get him to check the coil packs if they are cracked bin them and buy some more