Technical marea misfiring

[nick0111840]

hi,
i have a 1997 fiat marea 2litre 20v hlx,it is misfiring,does anyone know what could be the problem and how to fix the problem,one of the coils was broke,so i changed it and also changed the sparkplugs and put a petrol ijector cleaner in the fuel,but still no joy.please help!!!

 

[FDF]

The only time a car has misfired for me was when it had a knackered head gasket. I hope I'm wrong.

 

[jug]

get a diagnostic first, its most likely to be a sensor fault. we could guess all day, but without something to go on you'll be taking a stab in the dark.

 

[Renegade_8]

When i had a mystery misfire on my BX (years ago) i got one of theose mobile tuning franchises out to it. It was a crack in the ignition module, but you had to unbolt it to find it and it was intermittent. So money well spent.

 

[nick0111840]

thanks for all your answers,all the ignition coils are working checked for sparks today,i only replaced the plugs about 1 month ago and there all black with carbon already!!!any ideas

 

[jug]

overfueling or weak ignition. since you have seperate coils, and all plugs were black, it is far more likely that you have overfueling.

as i said before, get a diagnostic done, it sounds like a sensor fault (we can now assume a sensor related to fueling is most likely)