I have swift 89 model ,it has low rpm problem when I fill up cng from shell or total pump that whenever i press clutch for changing gear or press brakes to stop, engine rpm drop and start jerking of engine and some time engine shutdown, but it fines after pressing accelerator pedal simultaneously applying brakes.
for save side not stalling any where,i usually increase little rpm just by clockwise turn of the rpm screw at the carburator after filling cng ,then it runs fine and no jerking of engine.
the problem is that when cng reach to 50% ar 40% (120-150 psi),I feel rpm ,cng consumption & engine sound increase,then back to previous rpm by turning the screw anticlockwise then it runs ok with no low rpm problem.
The problem happens whenever i fillup the cng.
milleage is very low 100 to 110 km in city with 50L cyclinder.
