RoninRX7

So i had a huge break through yesterday. I started the 10th AE, and it ran longer than it ever has before. prolly 40 seconds or so, then it fouled the plugs with too much fuel. It turns out that the yellow mark was about 90* off. Once i reset it, it started and ran well. I have a 255lph walbro pump in it, and stock injectors. Do you think there is to much pressure and its causing the injectors to leak? I just bought an Aeromotive FPR yesterday, and was gonna throw that on to see what it does. What PSI should i set it at? What else could be causing my problem? Thanks.

RoninRX7