Sir got changed second fuel pump today. I feel like this app is not performing well with portable scanner on Dayz as I also checked the same scanner on my JDM Alto and readings are very spontaneous. This app shows 0% STFT while idle and changes value unless I press the accelerator but in my Alto its shows the STFT value in idle too.
Are you suggesting to use any other car/brand fuel pump?
I will do that on Monday InshAllah. A close friend recommended Mechanic4u workshop as its owned by an NED engineer and heard that they have all needed equipment.