egr removal and ems vs piggyback help
 

So, this are my 2 problems.
1. I know I saw somewhere a diagram showing wich hoses to remove and wich to cap. I made my choise and wish to remove it. Can you please help me ?
2. I upgraded my car to a point that in my opinion there are 2 routes. 1 is to lighten it up (lack of money for further upgrades that are over 1.000 USD/mod), the second is to tune my setup to maximize it's potential.
So I was thinking Apexi SAFC to adjust my A/f ratios on various conditions. Is this ok, or is a waist of money and I should wait and save for a stand alone EMS?
Wich EMS? Wich Fuel computer? Please input your 2 cents.
Thank you.
PS. I want at least a fuel computer because I just installed a wideband to find I am running MEGA LEAN at idle, and PIG RICH at WOT (18 at WOT and 10 at idle). Any idee what can cause the lean idle?