mk1 focus rs misfire

[Mike Rainbird]

Before spending money on anything, give Rob Oldman a call at SCC, as it can be a number of things on these cars and he will be able to tell you what is best to look at just by you describing the issue .

[cozzylee]

cheers mike will give him a call later

[M88RT J]

pumps working plugs sorted still got the missfire think its coil and leads next anyone know best place to get them from ?

get ford leads, when we changed ours they had non genuine ones on and they weren't really the best fit for length going to the coil pack, i would change the coil pack as well , matt lewis do them for about £35 delivered

[cosmagedon]

Or a air leak. Theres the worst car I've ever had for missfires I've changed everything on mine and its still got a missfire at 4k

[cozzylee]

found the problem chargecooler leaking into the intake 2500 quid from ford ouch got one from ebay

[Carparts Express]

A few chargecoolers have split now...silly money for a new one like you said

[kevin1987]

Hey There, i got the same Problem... but my intake is dry

[The Radman]

you will be better off on a focus forum, noT many owners on here and the threads over 6 yrs old so theres probably even less now lol i wondered why rainbird was posting

[cozzylee]

Mine was rubber hose on bottom of inlet had a split hard to see