After getting up to about 4-5psi and letting off, I am getting a really strong scent of fuel. I checked all of my lines, and no leaks anywhere. When I park there's no fuel dripping anywhere, and I'm not noticing any (dramatic) gas mileage effects.

Is this just my FMU dumping so much fuel that I'm shootin it out the tailpipe? It's a 12:1 on my Greddy, and gets up over 100psi at that range...

jB

 

do you have an open dump tube and external wastegate?

 

Internal WG (Greddy TD04H kit), and a plastic tube coming off the valve cover and going straight down.

 

Double check all your fuel lines going to and from the FMU and off the FPR on the rail. I eventually blew my fuel return line off when i was running an FMU and 100+psi fuel pressure.