Hello, I have Santro 2004 model. The car runs fine on CNG but it has following issues on petrol
idl rpm drops - When started in morning on petrol it drops rpm when idling, seems like engine is going to shut but the rpms come back up again. rpm drop happens once in like 5 seconds when idling.
Low pick and slight missing in 2nd gear - Have to accelerate slowly in 2nd gear.
I have got the car checked and replaced the fuel pump, fuel filter, got the fuel injectors ultrsonically cleaned, fuel lines cleaned etc. the performance is better after these changes but still not upto the mark. The car runs perfect on CNG. Looking forward to your suggestions.