there is no fuel return line on any sienna. the pressure is regulated at the pump and any excess fuel is dumped into the tank directly.
need to no the fuel delivery line on 89 chevy truck fuel pump
No, Only the supply line has to be submerged in fuel.
the fuel return line is on your fuel rail. it is part of the Pressure regulator assembly. Please view my Bio for access to my Saturn help site. in the fuel folder, go to Fuel pressure lines. the return line is highlited in green for you
No, there is no return line. Because of the low pressure of fuel systems on carberated vehicles, there is no need for a return line.
A fuel return line should flow freely back to the tank. There may be a check valve on the fuel return line that prevents backflow from the tank to the regulator.
Put simply. Yes it does. The fuel return line comes off the bottom of the fuel pressure regulator and heads back to the fuel tank.
The fuel supply line is usually larger in diameter than the fuel return line.
need photo of return fuel line off motor from a 89' toyota p.u.4x4 with a 22RE motor
Both types have a vacuum line running to them: On the 3.8 engine it is on the fuel injector rail (Metal Fuel Line) near the return line. On the 3.4 motor the fuel return line is mounted to one side of the regulator and it is attached to the fuel rail on the other side.
There is a pressure regulator on the fuel rail, it regulates the fuel pressure to about 45 lbs/sq.in. Excess gasoline is sent back to the fuel tank via that return line. If the return line is somehow blocked or plugged up then the excess fuel might cause flooding thus the engine would die. I assume that when you loosen the return line it leaks fuel out?