Originally Posted by SOON2BE7.3
I filled the fuel bowl up with fuel but no start. Will it start even if the pump in wok in? Does that fuel pump on frame pressure rise the bowl or something?
On a 97, there is only one fuel pump. It's a mechanical pump on the back of the engine right underneath the turbo. It's a dual-purpose; one plunger lifts low pressure fuel from the tank, and the other plunger pushes high pressure fuel to the injectors. The truck will not start if the pump is bad. You need a minimum of about 20 psi to start the truck, and then about 50 to run it. 65-70 psi is ideal.
You also need oil in the HPOP for the injectors to fire. There is a plug on the driver's side of the reservoir at the front of the engine. Oil should be approximately 1/2 to 1 inch below the top of the reservoir.