So I installed my ECA-2. I was trying to find a good place to mount it, ended up mounting it to the firewall behind the intake manifold. I have the return line curving around and going slightly uphill into the sensor. I was just thinking that the return is probably gravity fed. Is it gong to be a problem having the line slightly uphill before going through the sensor? I was watching the fuel pressure and it remained the same before and after the install.