aoa to all PWs!
I need advice/ expert opinion regarding CNG mileage of my 2005 civic exi (prosmatec) which has gone down after every passing week.first, some background of the issue.
It all started approx 8 month ago, when i decided to get my CNG kit and 55 kg cylinder cleaned (although i was not having any issues).since then,its cng consumption has gone from 100+ to 80/85 and now around 70/75 km ( i dont use AC that much and try to keep it below 2500 rpm, and no hard revving)
in Rwp, i have gone to 5 to 6 CNG mechs, they all have tried there 'todkas' with confidence without any result at all and loss of money as well. following things already done a number of times.
a. general CNG tuning ( gas pressure/ air flow/ adjusment).experiments done from either keeping them too low to too high as well with no advantage
b. throttle body/ map sensor cleaning twice from different mechs.
c. tappet setting.
d installation of automatic screw for gas adjustment (mech told me that this device is connected with emulator and after this no cng setting will be req..but no result either)
e. cng leakage checking.
f. spark plugs change twice.
g. air filters of different quality thrice.
NOW, after all that , do you guys suggest that there is something else to be checked also. i mean all mechs say that this being a 1.5 lit car should easily do 120 km + in a cylinder in city driving (despite being auto tramsmission) but actually it is doing almost half
need desperate advice/ help or reference of a realy good mech of cng in rawalpindi. thanks