Aeromotive 🔧 13109 Adjustable Injected Regulator Review

Excellent quality and function as advertised. Screw in your choice of liquid-filled fuel gauge for easy pressure adjustment.

Excellent Fuel Pressure Regulator. I use one of these in a Subaru Sti and a ls Swapped C10. It works great for both and can hold constant fuel pressure.

Only downside is the pressure drops to zero within a minute of removing the key so you have to run the pump for a while to start the car. a few seconds to build up pressure.

The regulator works fine. I initially had problems with the ESC and called Aeromotive Technical Support. The measure of a good product/company is how it responds to problems, and in this case, A+. It turned out to be one or more operator errors. Technical support was excellent and very helpful. Very good fuel pressure regulator.

Cheap chinese exactly the same worked fine after I fitted an air motor diaphragm. But back then I couldn't tune below 60psi no matter what. Spring didn't allow it. This one works great and now I can set it as low as I want. I think the pressure will go up to 35psi which will allow me to use more of my fuel pumps. Should have bought it first. Cheap Chinese stuff is good, but sometimes it's better to buy real stuff.

The block I received does not provide constant fuel pressure close to atmospheric pressure. It works well under high vacuum or high boost, but the transition point from -2 to +2 psi of manifold pressure is unstable. I can watch my injection pulse width increase dramatically at those few hundred rpm and my AFR goes from about 14:1 to 15.7:1 and until the fuel pressure stabilizes. It's not even always the same, so it's impossible to tune in. I checked to make sure the hose fitting was not making…