bmw x5

to all sifus,

i need help on my aerospeed fuel regalutor, firstly the gauge meter no function so my mechanics can adjust it, i tried to replace a new one same problem, they try on a wira it works.. mine is a waja 1.8gx convert to 1.6 mivec manual. pls help.
2. the weird things is after converting my engine the aircond works till 90kmh after i head to 100kmh on hot air comes out, why? and how to repair it? pls help
3. my water temp meter rise n drops so does my mph meter. still using...