Universal Standard

Universal Common Standard

1. Normal manifold vacuum at idle for an engine in good condition is about 18 to 22 in. -Hg.
2. Perfect Air to Fuel ratio for petrol combustion engine = 14.7
3. Static fuel pressure 100% duty cycle = 43.5 PSI
4. Fuel Injector Flow Rate = 1 lb/hr OR 10.5cc/min OR 10.5ml/min at given static fuel pressure 43.5 PSI
5. Fuel economy average 5L/100km > 8L/100km (best), 8L/100km > 12L/100km (normal),  12L/100km > (Poor Fuel Economy)
6. Alza fuel pressure = 50 psi --- If much lower than 50 psi then clogged fuel filter otherwise higher than much more than 50 psi then faulty fuel pressure regulator on the fuel pump. In the even fuel pressure regulator is the problem therefore replacement of the the whole unit of fuel pump is recommended (read D.I.Y. S)ERBAMANEKA: Periksa Tekanan Minyak Petrol Perodua Alza Cara koman)
7. Alza using EFI fuel system = Electronic Fuel Injection System (Control by ECU)
8. Ideal fuel pressure range between 45 to 58 psi or (3.2 to 3.4 bar)