2004 Fiat Stilo

Engine Performance problem
2004 Fiat Stilo 4 cyl Two Wheel Drive Manual 62000 miles

car is misfiring I changed plugs how do I test or check ignition coils or could it be something else

Garry thompson
August 20, 2010.

Find out which cylider is misfiring. Swap 2 of the plug leads one from misfiring cylinder to a cylinder which is not misfiring. If misfire swap to new cylinder location you have a bad wire/plug. If it stays on same cylinder you have a bad coil or it could be an injector

Dave H
Sep 30, 2010.