3top,
I assumed that you may have flown a helicopter before but maybe your watch no longer works. Do you keep a log of your fuel flow/consumption based on past history?
Trusting the gizmos implicitly is probably not so wise in any respect.
Study the available tech data you have and work out what is "wrong" with the fuel system. (Read between the lines).
Get back to me when you have worked it out.
BTW MEGHAS and CPDS are not related. A B3 or a 120 are pretty simple compared to a 135.