The carb is drowning the engine in fuel. Way too bigger CFM for a 2.0 as well. If you go for a 32/36 make sure it's jetted for the 2.0 and also have a look at the electric fuel pump the PO installed. The Weber relies on fuel flow not pressure to work - about 3.5 psi is optimal. You get the jetting right and tune the ignition to run the 32/36, and it'll pull like a train all day and give you decent fuel economy when you drive it conservatively (if you can stop having fun for 5 minutes...)