hi folks my brother has a vev b with miss fire this is what hes done.
vauxhall vectra 2002 reg number KP02KRN. 1.8 LS.

HAS GOT A MIS FIRE, HAVE CHANGED THE VALVES IN CYCLINDER C WHICH DIAGNOSTIC MACHINE WAS POINTING TO, HAS GOT NEW COIL PACK. NEW SPARK PLUGS, NEW CAM BELT, NEW GASGKETS ALL ROUND.
STILL MISFIRING. WHEN COLD IT IS VERY SLUGGISH AND NEAR INPOSSIBLE TO DRIVE TILL OIL WARMS UP THEN DRIVES FINE


any ideas folks .
thanks Jamie.