mitsubishi galent 4g93 engine(gdi)

Nov 14, 2015
1
0
1
36
matara
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