Fuel pressure spring

It is located at the rear of the primary fuel filter base.I think a 1inch wrench fits it.

 

Put a gauge in the filter housing and then pump the hand priming pump and see if it builds up pressure and holds it. The prime pump should go hard as to push in.

 

i have a mxs and it doesn't hold it was told it's not supposed too?

 

diesels have carbs...

 

i dont believe he meant it literally. An inline pump creates alittle positive pressure so no restriction from trying to suck fuel out of tank?
My interpetation of Mikes post ???
(And if you want to really muddy things up, they have plug wires also...)

 

If you put a gauge on the fuel filter test point and shut down the engine you will see it holds a residual pressure which will slowly but surely drop over time. If it drops instantly then you have a problem.

 

I know some of those tools don't work as well as others Especially on Ford and Lincoln. I can tell you this. Harbor freight has a set that comes with like 5 different disconnect tools. They are all different colors and those work best for Ford. I bought a set from Snap on that are plastic and white on a black bar. Those work best for GM and I've had no luck on Ford vehicles with them. But what you do. You push that tool as far in as possible. On the one side of the line that you are supposed to put it in. While applying pressure to the tool you apply pressure to the other line and pull outward spraying fuel everywhere so have a rag handy to lay on the line to block the fuel from going into your eyes.

 

I left the word "never" out of my post, sorry. I meant, "diesels never have carbs"......ahahaha, nice place to slip up like that, eh?