mitsubish galent 4g93 engin (GDI)
 

dear friends
that 4g93 engine's plugs get darken (carboned) gradually 4 to 1 what is the reason for that. partially burned fuel smell comes from exhaust gas. i repaired ECU for GDI pressure sensor supply voltage drop.
fuel pressure , lambda o2 , maf, temperature sensors working . i cant understand that problem please give me a help and i want to know cooling fan operating temperature of this engine. fans operate at about 110 c................


thanks

sorry, this is a toyota forum so probably not gonna get a lot of help for a mitsubishi