Misfire at 206 lpg and petrol

My friends vehicle is singing on LPG and petrol. Spark plugs changed, injector changed, LPG maintenance was done, the problem did not improve. 1.4 2004 model lpg li 206 Bayrambugra2020-05-20 13:42:42

75s or 90s

Coil can

Did the spark plugs leak there? If this is the case, the rocker top cover gasket

I don't know how I know how far

I will change the coil at the first opportunity

What is the reason I saw oil leaking in the lpg brain

I guess it is in the spark plug or coil if it sings both in LPG and gasoline