erm i would like to ask if my waja 1.6 fuel meter sometimes functioning sometimes not functioning normally what is the problem a? isit fuel pump ? normally its only function when i start my engine that time after few sec it will drop to the empty bar.

I would like to ask waja auto 1.6 use which Iridium sparkplug and spark plug cable is more effective? which brand is more suitable for waja any sifu?
If can leave down the pro and cons also ya thanks alot