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Why my engine is knocking on petrol?
i have zen estilo 2007 petrol+CNG, i don't know what engine knocking is but it sounds like this 'tak-tak-tak' 2-3 per second not too loud but audible all around the cabin and car. the noise magnifies with acceleration and specially when ac is on, in mostly 3rd gear, either there is no sound in idling or it is in inaudible, however car runs well in CNG, no matter which gear or rpm-its soundless in CNG.
ok ok...i isolated the issue....when i take acceleration i.e press gas pedal too quickly when car is in gear it makes that noise however if i increase acceleration gently and slowly noise doesn't come. i can retard or stop such noise by easing gas pedal. pls explain why this happens
1 個解答
- ?Lv 57 年前
Propane is MUCH colder and less volatile than gasoline, what you're hearing is pre-ignition. Try running a colder range spark plug and/or retard the timing a degree or so.It will run a little less efficiently on propane, but you won't blow holes in the tops of your pistons. Good luck.
