This is topic Fuel issue!!!? in forum Tech Talk at Northern California Ford Owners  .


To visit this topic, use this URL:
https://californiafords.com/cgi-bin/ultimatebb.cgi?ubb=get_topic;f=6;t=029921

---

Posted by BuiltSaleen (Member # 13850) on :
 
Posted this on the fb page but, no help. here's my issue. Why does my fuel pressure regulator leak out of the vacuum port? Changed the regulator and still leaks, seems like a have alot of fuel pressure but, why? Clogged injectors? Car runs but, rough and rich because of the leak. Set up is hci 347, vortech supercharged, aem everything, anderson ecu, 39lb injectors, calibrated maf ect
 

---

Posted by Fostang (Member # 3752) on :
 
Sounds like you have two bad regulators.

They have a diaphragm inside with a spring. Fuel pressure comes in builds a up and bypasses out the return at the set pressure.

If it's leaking out of the vacuum the diaghram has ruptured. I have seen rail pressures as high as 100psi where the injectors hydrolok. Your problem doesn't sound like a high pressure.

[ 2016-08-20, 06:21 PM: Message edited by: Fostang ]
 

---

Posted by S351-R (Member # 1605) on :
 
Try another FPR. If that one ruptures too then you may have a plugged/restricted return line and it could be building up enough pressure to rupture the diaphragm in the FPR. Hook up a gauge and see where the fuel pressure is at first. Out of curiosity, are you running a Vortech FMU?

[ 2016-08-29, 01:22 AM: Message edited by: S351-R ]
 

---

Fueled by Ford Mustang Owners
on CaliforniaFords.com