A.o.a . i have civic 1995 with "d15b carbi" . Alhamdulilah i know very much about cars but here i am facing a very rare issue for which i want your solutions also . that is i have cng attached in my car
with AC ND RpM UNDER 2K MY Car gives mileage of 100km per 60kg cylinder mean approx gas amount 550/-
nd on Petrol under 2k RPM mileage is 7
but when i drive lil fast above 2k my car go to max 60-70km on full Cylinder
nd on petrol at 5km
i dun think muffler only causing this effect
plz share your solution also thanks
Don't know about muffler.. but my civic 95 with weak d15b used to give me 120-130 on local and 140-150 on long on per CNG cylinder.... in my empty cylinder 9kg gas easily filled... on petrol it was giving me around 10-11.... now i have installed brand new engine jdm d15b and i have still not got time to take it to work shop for tuning... currently its giving me 100-110km on cng RPM under 3k and on petrol with aggressive drive RPM crossing 6-8k on 1st and 2nd gear .. it was giving me around 9.3 t 9.5.... you need to tune your car and service cng kit and drain oil. may be that help but wait for senior members comments.