Bob Avellar
Member
- Joined
- May 25, 2001
- Messages
- 368
Just got my motor running today-Woo HOO!!Used 8 AN fuel feed line (1/2") attached to the steel line at the pump hanger in the tank. Used 5/16" steel vent line. Used a shorty 90 degree Earls fitting under the fuel pressure regulator 1/4" I think to a 6AN return line (3/8") which connects back to the steel pump line at the tank.
This is what happens:
With the pump running for a few seconds at startup and then again after engine shutdown I can set the pressure to 45psi. I can adjust this pressure (with pump not running) way down if I want to. However when the pump is running continuously like when the car is running I can't get the pressure below 70psi! As soon as I shut the motor and pump off the pressure will go back to whatever I set it for-like 45. Putting the vacume line on the reg has no effect. I tend to think that somehow there is a restriction in the return line (but I can't see how). My guess is that when the pump is flowing the regulator can't bypass enough fuel to lower the pressure but it works fine and is adjustable when the pump shuts off. Anybody encounter this before? I plan to disconnect the return line tomorrow and blow air throgh it to see if it is restricted or not. I never had a problem with this regulator before right up to the point where I took out the motor so I don't think it is the culprit unless something got in it and is blocking it from working. Just looking for some hints, past experiences or troubleshooting procedures to try. God it was great to hear her running again after over a year!!!! Today was a very good day!!
This is what happens:
With the pump running for a few seconds at startup and then again after engine shutdown I can set the pressure to 45psi. I can adjust this pressure (with pump not running) way down if I want to. However when the pump is running continuously like when the car is running I can't get the pressure below 70psi! As soon as I shut the motor and pump off the pressure will go back to whatever I set it for-like 45. Putting the vacume line on the reg has no effect. I tend to think that somehow there is a restriction in the return line (but I can't see how). My guess is that when the pump is flowing the regulator can't bypass enough fuel to lower the pressure but it works fine and is adjustable when the pump shuts off. Anybody encounter this before? I plan to disconnect the return line tomorrow and blow air throgh it to see if it is restricted or not. I never had a problem with this regulator before right up to the point where I took out the motor so I don't think it is the culprit unless something got in it and is blocking it from working. Just looking for some hints, past experiences or troubleshooting procedures to try. God it was great to hear her running again after over a year!!!! Today was a very good day!!