Fuel pressure questions
Hey all! Just got my gostreet 400 back from Fitech. New ecu. Fired right up! Question- fuel pressure is pegged past 100. Never used to do that- sat right at 58. Newbie here- warming her up to set iac now but that’s too much fuel pressure. Thoughts?
The fitech internal fuel pressure regulator should be allowing fuel to return back to the tank over the prescribed regulated pressure of 58 psi or similar. If the return line isn't plugged, then the internal regulator isn't working, preventing excess fuel from escaping back to the tank. That happened to me, so I blocked off the return line from the fitech and put that return line on my external regulator I put in. Now I can control the pressure at the fitech inlet to whatever I want, so I set mine at 58 instead of the prescribed 43 of the meanstreet 800 internal regulator, giving me more fuel delivery capability, making my meanstreet 800 into a meanstreet 1000.
The Go Street 400 requires only 43psi to run properly.
I'm running the Go Street 400 with a Command Center 2. When it was running the 351 Windsor ran great. Engine won't start now and I'm in the process of sending the throttle body back to Fitech. Not sure what the no start issue is but I would like to reduce the psi. Is there a way to reduce the Command Center 58 psi to 43 psi?
Any help would be appreciated,
Keith
If your fitech throttle body is designed for 43 psi, i.e., if you have a 43 psi regulator and it's working correctly, it should already be at 43 psi at the fitech inlet. If it's not working, you can replace it, or put in an external regulator between the CC and fitech.
Quote from Keith Raffel on February 19, 2020, 3:53 pmI'm running the Go Street 400 with a Command Center 2. When it was running the 351 Windsor ran great. Engine won't start now and I'm in the process of sending the throttle body back to Fitech. Not sure what the no start issue is but I would like to reduce the psi. Is there a way to reduce the Command Center 58 psi to 43 psi?
Any help would be appreciated,
Keith
The regulator in the FCC and in your Fitech are interchangeable. The FCC is a 4 bar (58psi) and the 400 Fitech is a 3 bar (43psi). I have had guys swap them around to get 43psi on their unit, since the Fitech regulator is not used with a fcc.
Quote from bdhulderman
@bdhulderman
Can you shed some light on exactly how you bypassed the fitech for and plumbed in your better one? I think that's what we're going to do because we're seeing 80psi at startup rn