Ok ive tried everything and discussed this in other forums as well but havnt had any luck..., i have a civic 04 prosmatec ,it had cng init earlier ,its only 45k done, and i
ve been witnessing very bad fuel average (approx 6.5 km/l).somebody told me that because of CNG the valves get disturbed and they need to be re-done in order to get the actual fuel average. My question is , is there anyway to check if the valves are doing ok or not? my car has been thoroughly checked by honda and other renowned mechanics (khan ..etc)of karachi and has been found absolutely ok.. things that i`ve already tried are mentioned below
throttlebody serviced.
different airfuel mixture settings tried, now reset to actual as prescribed by honda.
wiring checked.
gear ratios reset.
tappets reset.
plugs/airfilter/oils..checked/replaced.
Also tried different driving patterns...no help!
Would really appreciate some advice or if somebody in khi can be referred to.