Remove pressure regulator on rail, unhook return line and plug the rail. Add an electric fuel pump and regulator to the fuel rail inlet line. Connect the fuel tank return to the inlet of electric pump.(Saves in-tank pump)
Big question is will the fuel pressure regulator maintain constant pressure when the engine is high revving?
2007-08-20 00:54:48 · 5 answers · asked by DH 1 in Cars & Transportation ➔ Maintenance & Repairs
So, basically what I need a pressure regulator that will raise the pressure when the engine uses more fuel lowering it.
Pressure regulators in scuba diving take varying pressure in the tank and maintain a single pressure output.
What kind of fuel pressure regulator would do that?
2007-08-20 01:03:23 · update #1
If my additional fuel pump is creating significantly higher pressure, then reduced by the regulator why wouldn't it compensate for a pressure drop?
2007-08-20 01:05:46 · update #2
ok, ok. my bad, connect the fuel return line to the output of the electric fuel pump to avoid sucking tank air and blowing up my car.
2007-08-20 01:11:46 · update #3
No, it won't. The pressure regulator utilizes the return to the tank to regulate the pressure. Since you're proposing removing the return line, fuel pressure will rise and fall based on fuel consumption. At high consumption rates, fuel pressure will fall, and will rise at idle.
2007-08-20 01:00:06 · answer #1 · answered by Galaxie500XL 5 · 0⤊ 0⤋
Only new cars designed to run with out the return line. Your system requires the return line and pressure regulator to maintain 35 psi in the fuel rail. Nissan returnless systems run 60 psi and have the injectors that can do it. If you connect a return line to a pump inlet it will suck the gas tank air out and won't pick up fuel. return line puts fuel back in the tank at the top. Please dont go messing with evaporative emissions controls tanks fuel lines and return pressure regulators. It will turn on the check engine light. I would not want to hear about the giant fire ball!
2007-08-20 01:04:52 · answer #2 · answered by John Paul 7 · 0⤊ 0⤋
I would think that replacing the original regulator with a different type would still require a return line to work as accurately as needed.A small variation in pressure would cause performance problems.Just knowing that the auto companies have explored all options and decided on one standard method is proof enough that what we already have is the best.
2007-08-20 01:08:13 · answer #3 · answered by wildmanny2 7 · 0⤊ 0⤋
That will not work as soon as the injector open it will reduce the gas pressure so when the next injector opens the pressure will not be high enough.
2007-08-20 01:00:45 · answer #4 · answered by Anonymous · 0⤊ 0⤋
No and there will be damage to the injectors at low revs because there is nowhere for the extra fuel to go.
2007-08-20 00:59:29 · answer #5 · answered by Jody D 6 · 0⤊ 0⤋