I've been having some rough idle conditions on my 03. I initially thought it was due to the cracked intake manifold, which I'm still not completely convinced it didn't kill a couple cops by saturating them. At any rate I've since replaced the intake with an frpp replacement. I cleaned the maf and that smoothed the idle somewhat for a short period of time. I decided to see what fuel psi looked like, with a mechanical gauge on the test port it idles at 28-30 psi. During cranking it drops to around 20. During idle, the fpr reads 40psi via an sct and my genesys. Does that sound right? I read somewhere that fords spec was 28-50 psi or something. That's a really broad range. Ideas?