I need your help. My Car (Honda Civic 2005 Manual) is giving me a throttle problem on petrol. While driving over 40 km/h, I feel that the car is giving me bumps. RPM is stable on both petrol and CNG. The car also works perfect on CNG. Only the problem is on petrol.
My mechanic says that the fuel injectors are ok and he has advised me to put liqui molli fuel injector cleaner. The car has done 120k kms.
service the throtle body
clean the injectors
change fuel filter, put new filter only. as far as your car is concerned, it might be in the tank, so when you get it opened, get it sealed properly, specially if you are a smoker...
check fuel pump pressure.