injector problems need help

[behlinla]

You're getting 80 PSI at the fuel rail? That's way too high. You probably have some kind of blockage in the return line or a failed pressure regulator.

[mr.b]

thanks im gonna take the fuel rail and injectors off my old engine and give that a try thanks for responding

[jw89sho]

regulator is bad

[behlinla]

Originally Posted by mr.b

thanks im gonna take the fuel rail and injectors off my old engine and give that a try thanks for responding

A different fuel rail and injectors aren't going to change the pressure.

[Breeves002]

I swear I saw another post where he said the regulator was good. So I would check for blockage in the return line.

Why wouldn't the injectors fire if the pressure is too high? The light lights up but no fuel comes out? Wouldn't an abundant amount of fuel come out? I guess it's possible the blockage is somewhere else?

[behlinla]

If the pressure is too high, the magnetic force from the solenoid coil is insufficient to overcome the force on the plunger from the pressure. So the injector stays closed. Since fuel injectors are designed to deliver a precise amount of fuel, they are designed to operate with a specific pressure drop across the fuel injector. In the case of a Ford injector, the ideal pressure drop is 270 kPa.

[Rogerm60]

Originally Posted by behlinla

You're getting 80 PSI at the fuel rail? That's way too high. You probably have some kind of blockage in the return line or a failed pressure regulator.

A bad regulator usually results in 40 psi or leaks into the vacuum line.
Methinks the return line got damaged installing the engine.