I just fired up my engine after installing a TPI unit on my 86 iroc z. It is running really rich. I checked the fuel pressure at idle. It is dancing around 60psi. I unhooked the return line and let it pour into a gas can and the pressure is down around 40psi at idle. I am thinking that I have a clogged return line. Any ideas on how to clear it out? Or is there anything else that I should check?? Any help would be great!