What psi should my fuel pump be putting out?

[Nunzio]

My electric fired beckett burner keeps spewing black smoke,sometimes keeps pumping fuel into the insulation and not igniting.
The fuel nozzle is not clogged or obstructed by anything. I checked the electrodes they are adjusted correctly and they do fire up correctly when the heat switch is on and they are in good shape.

The fuel nozzle itself is new.

Maybe too high fuel pressure?

It's an older Northstar.
I had a coil made for it as the original one is no longer available.

And the original flow valve went bad a couple years ago and I opted for a pressure switch on the General pump.

This problem started 6 months ago.

 

[Sirocco Jerry]

Maybe too high fuel pressure?
It's an older Northstar.
I had a coil made for it as the original one is no longer available.
This problem started 6 months ago.

Nunzio,
Fuel Pressure should Always be over 100psi for igniting Diesel Fuel.
110 to 130psi is best.. over 130 is stress on a 12vDC burner and the Fuel pump.
But.. you mention a new coil.. If the Coil isn't an Exact replacement..
you probably need to adjust the AirBands on your burner.
And for the Best electrode adjustment..
I've found a slightly tighter adjustment is more Reliable..