I have a sc400 with 1jz single swap. Stock sc400 fuel pump, stock lines, AEM FPR, 440cc injectors (750s and rail waiting to go in
), big 70mm turbo.
I need to know what is the max fuel pressure that a healthy stock sc400 fuel system can put out?
I am having leaning issues starting around 7-8psi. I have already tried adjusting fuel map all the way up at those datum points. I just don't think I am supplying enough fuel. BUT, I have had the car for 4 months now, and haven't had these issues. I am wondering if my fuel pump and/or filter are going bad. Although, previous owner supposedly put brand new pump in shortly before I picked it up.
The MOST I can adjust the FPR up to is 38PSI (with vacuum connected). I seem to think before when I first started tuning it, that I was able to adjust it much more than that.
Please guys, give me some numbers if you know them and thanks.