rodman68
Full Access Member
Ok got another issue with the excursion figured I would check this after rebuilding fuel bowl and dropping the tank to do hutch mod and fix fuel level sensor.
Ok I got a fuel pressure connection on the input side of the fuel bowl from a guy on ebay makes it nice to check the fuel pressure, times past I did a inline T at the fuel pump.
So I can only get 48 pounds with the engine running and this is with the strongest spring I got from Diesel Orings should be 65-70.
Dropped the tank and the filters were kinda nasty so that is why I am doing the hutch mod for sure and installing a inline screen before the pump.
Got a new pump and pressure went up to 50 still not even close to my target of 65 and this test was using a 5 gallon fuel can direct to the new pump. These tests were done running if I check with cycling the key it gets about 30 psi seems really low to me, I thought in the past it would hit 55 with just cycling the key.
Since the tank is out of the truck I put a return fuel catch can to pressure up the system and see if I have return fuel.
Well I have return fuel coming back but the pressure is only at 30 psi when cycling the key only.
So if I am thinking this correctly I shouldn't see any return fuel until the fuel bowl pressures up to the 65 psi correct?
Oh wait a minute there is a small hole in that brass poppet in the pressure regulator but that shouldn't flow that much fuel?
I am kinda at a loss here any ideas out there?
I am going to check voltage at the fuel pump maybe tonight if I have a chance would assume it would be 11 volts on initial startup?
I have a pump test wiring that I might run directly to the new pump and see what that does to the pressure.
Sad to see Excursion in the garage on jack stands
Ok I got a fuel pressure connection on the input side of the fuel bowl from a guy on ebay makes it nice to check the fuel pressure, times past I did a inline T at the fuel pump.
So I can only get 48 pounds with the engine running and this is with the strongest spring I got from Diesel Orings should be 65-70.
Dropped the tank and the filters were kinda nasty so that is why I am doing the hutch mod for sure and installing a inline screen before the pump.
Got a new pump and pressure went up to 50 still not even close to my target of 65 and this test was using a 5 gallon fuel can direct to the new pump. These tests were done running if I check with cycling the key it gets about 30 psi seems really low to me, I thought in the past it would hit 55 with just cycling the key.
Since the tank is out of the truck I put a return fuel catch can to pressure up the system and see if I have return fuel.
Well I have return fuel coming back but the pressure is only at 30 psi when cycling the key only.
So if I am thinking this correctly I shouldn't see any return fuel until the fuel bowl pressures up to the 65 psi correct?
Oh wait a minute there is a small hole in that brass poppet in the pressure regulator but that shouldn't flow that much fuel?
I am kinda at a loss here any ideas out there?
I am going to check voltage at the fuel pump maybe tonight if I have a chance would assume it would be 11 volts on initial startup?
I have a pump test wiring that I might run directly to the new pump and see what that does to the pressure.
Sad to see Excursion in the garage on jack stands