Fuel Pressure Regulator Settings
 

Ok, my 7 has never started very quickly, it would take about 10-15 seconds while pumping the throttle from a cold start. My JDM engine came with a weird aftermarket fuel pressure regulator, (external by the way, the factory one was removed and the hole soldered). Anyways I bought a adjustable FPR with a gauge on it and now my car won't start at all. Ive adjusted it continuously and the only thing ive been getting is a few loud pops from the exhaust. Flooding??:scratch:. I read somewhere that the starting psi should be around 70psi ? When I turn it up that high my walbro fuel pump won't pump cause it's too mush pressure. Or unless the gauge is off and it's higher than it's reading. :scratch: Help?

After the fuel filter it should be close to 30psi.

So 30psi when the fuel pump is running and the engine is off?

Fix it, it was just flooded. I did have to crank the psi up to around 50 though to keep it runnin

If thus is true, don't count on it running very long...

36 psi static ( no vacuum , as idle will be lower and it will depend on your idle vacuum )

examples with fuel pump relay bypass and or a decent fuel pump may idle a little higher
42 is not unknown or abnormal as such

most external regs will usually be set up as 3 bar ( 43.5 ish ) ( no vacuum,, idle will be lower ) as that is what most injectors are rated to,, and so keeps the math easier

I had the car's fuel set at 40psi,and it seems to be a fine setting.

Yeah I think i set it around 40 now. Come to find out I was very low on gas and I guess thats why i had it up so much. What's a good vacuum pressure at idle by the way?

my na 88 gxl runs idle pressure at 38psi and runs to 42 with my foot on the gas, i replaced my fuel pressure dampner with an electric fuel pressure sending unit.