Have you tried the turbobrick forum?
Sounds to me like you have to become more familiar with the fuel system in your car. An exhaust gas analyzer won't tell you more than emissions test results tell you. It certainly won't spell out in black and white what component isn't functioning. Don't let the cost of equipment and parts you're throwing at your car exceed what a professional would charge to fix it.
I don't mean to come across as condescending but all sorts of folks have sorted out emissions problems without an exhaust gas analyzer.