Fuel Regulator leak

[Souleman]

Actually hit a milestone last night, it cranked and started first time! I will admit, it's an awesome feeling to see it come to life! Doing my post start checks, I found the fuel pressure regulator appears to be leaking. It looks like I have fuel seeping out of the vacuum line attachment point which was soaking the top of the whole regulator. Has anyone else seen this? I am running a Gen 3 Coyote with the regulator supplied by FFR. Not the place I expected to see fuel coming from.

[gbranham]

I don't know much about regulators, but I assume engine vacuum simply opens a solenoid to allow fuel to pass through the regulator. If fuel is coming out of that vacuum port, maybe the seal in the solenoid is bad. Maybe?

[toadster]

shouldn't have fuel coming out of your vacuum port, i ended up removing the hose and adding a breather (https://amzn.to/3SFBpBX) to my port as recommended by many on here (and tuners as well)

https://thefactoryfiveforum.com/showthread.php?34952-25th-MKIV-9772-Build-NOR*CAL-post-paint-checklist&p=521619&viewfull=1#post521619

you may have a bad diaphragm in your regulator, I'd call Aeromotive and ask what to test

[edwardb]

shouldn't have fuel coming out of your vacuum port, i ended up removing the hose and adding a breather (https://amzn.to/3SFBpBX) to my port as recommended by many on here (and tuners as well)

https://thefactoryfiveforum.com/showthread.php?34952-25th-MKIV-9772-Build-NOR*CAL-post-paint-checklist&p=521619&viewfull=1#post521619

you may have a bad diaphragm in your regulator, I'd call Aeromotive and ask what to test

X2. Fuel shouldn't be present at the vacuum port. I would also suspect a diaphragm issue with the regulator allowing fuel to make it there. Not sure what brand regulator that is though. Last I saw the EFI kit from FFR didn't use the Aeromotive regulator. Also agree most tuners (including Lund that I've used) recommend not using the vacuum reference setup for a NA application. Even though it's in the FFR and Ford Performance instructions.

[OB6]

Just a reminder to remove the pressure gauge once you get the regulator set correctly. No need for it to be in the engine bay, as they are known to leak.

[Souleman]

I appreciate all the advice! I figured it was most likely a bad internal diaphragm, just wanted to see if anyone had experienced this or had other ideas. I'll order another regulator. I hate getting bad parts out of the box.

[OB6]

Do you know what brand it is?