Hey they im new to the forum and im looking for some help. Right my problem is a consistant misfire at 4k in any gear underload but no cel at first i thought plugs so i replaced them problem still persists then i thought id change the coil packs so i did still no change ive also replaced the maf and front 02 sensor and the problem stil persists its driveing me insane ant help would be appreciated thanks in advance...... could it be the crank posistion sensor on its way out ?????????