The Fire Extinguisher was loctaed by the doors on the left side and remmber to pul the pin n squeeeze the handle. The fuel pressure specications for the vehicle of nissan primera 91 is 365-304KPA
Firstly remove the Fuse of Fuel . then crank for 1 or 2 times until the fuel runs out. then disconect the fuel pump and get the Fuel Pressure and connect it to the fuel pump and other wire goes on the fuel rail then make sure everything is tight and no leakage. Then turn on the engine on then u can see the fuel pressure and the readings. so the fuel pressure was 250 Kpa. it same reading 250kpa for Idling. atfer that i used a special tool to clamp the fuel return line i pressed a bit hard so i can get the readings and the reading was 520kpa.
Atfer that i disconnect the plug of the vacumm line n use my finger to block the hole and got the pressure 325kpa. Neally done. turn the engine off and leave it for 5mins to get the fuel pressure and the the reading was 226Kpa. and the last bit it was 2.2 litre. atfer al put eveything back into the same spot and turn the engine and there was no leaks at all
The vehicle fuel pressure is very important so to see how mch the pressure goi from the pump to the fuel rail.
The low fuel pressure is when it having problems that cause hard starting and nt mch volume and pressure to the start to nomral and idling. The low fuel flow if not working maybe the faultys can be the fuel pump that cant generate enough pressure of the fuel pressur that why it called low fuel flow. The High fuel pressure is when the engine is running rich and the engine is running rich may have a rough idle and could be some leaks.The fuel pressure regulator dont fail often it if it was fail then the resluts of the reading wil be low pressure.
