Fuel Pressure Regulator Settings
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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??. 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. Help?
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talking head
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
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
Last edited by bumpstart; 08-06-11 at 10:14 PM.
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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?
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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.
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trickster
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