Y-TRY
11-21-2005, 06:05 PM
I Ninja'd another thread with this issue but decided to move it here for some help.....
....CarbShop Blow-Through carb
Aeromotive boost-referenced fuel pressure regulator....
I'm having a problem with my regulator adding pressure when there is no boost. Under normal loads the pressure will increase along with rpm and start to really flood the engine by about 10psi. It does not appear to be an issue with the gauge.
The problem stops if I disconnect the boost reference line. If I bypass the boost reference the system works fine, I just can't go into boost in this situation for fear of starving and leaning out. The regulator is there to offset the pressure in the bowls when boost is present.
It's like the regulator is sensing boost and adding pressure according to plan. However, there is no boost. It happens during normal driving (not WOT) So, instead of compensating, it's flooding the engine. With no boost-pressure in the bowls it's simply flooding them over and pouring raw fuel out the vents. The regulator is sensing that there is 3psi in the hat, for whatever reason, and forcing 10psi into the bowls (7psi base setting)
The main indicator for this is the fact that there is no problem with the boost reference disconnected. Pressure stays rock-steady. Fuel pump speed and voltage is steady also. This also eliminates the return line as being a restriction.
One possible issue: The boost reference line is connected at a "T" off the hat. The other side of the "T" goes to a line connected to the baseplate, per CarbShop. Because they are tee'd, it is possible that the signals to the regulator are being affected by pressure to/from this line. But that is my current diagnosis.
Can you guys help? What should I do?
....CarbShop Blow-Through carb
Aeromotive boost-referenced fuel pressure regulator....
I'm having a problem with my regulator adding pressure when there is no boost. Under normal loads the pressure will increase along with rpm and start to really flood the engine by about 10psi. It does not appear to be an issue with the gauge.
The problem stops if I disconnect the boost reference line. If I bypass the boost reference the system works fine, I just can't go into boost in this situation for fear of starving and leaning out. The regulator is there to offset the pressure in the bowls when boost is present.
It's like the regulator is sensing boost and adding pressure according to plan. However, there is no boost. It happens during normal driving (not WOT) So, instead of compensating, it's flooding the engine. With no boost-pressure in the bowls it's simply flooding them over and pouring raw fuel out the vents. The regulator is sensing that there is 3psi in the hat, for whatever reason, and forcing 10psi into the bowls (7psi base setting)
The main indicator for this is the fact that there is no problem with the boost reference disconnected. Pressure stays rock-steady. Fuel pump speed and voltage is steady also. This also eliminates the return line as being a restriction.
One possible issue: The boost reference line is connected at a "T" off the hat. The other side of the "T" goes to a line connected to the baseplate, per CarbShop. Because they are tee'd, it is possible that the signals to the regulator are being affected by pressure to/from this line. But that is my current diagnosis.
Can you guys help? What should I do?