leaking injectors or fuel dist will not smell like a fuel leak, only run rich.

do not adjust the eha.

MAYBE adjust the co with a meter on the eha looking at amps and another on the 10 pin connector looking at voltage. i also use a 3rd meter on the o2 wire and see how the sensor reacts.

i would give it to a shop and scope the ignition. just 'cuz it looks new doesn't mean it still works like new. have had 4 different sets of bosch wires on 3 different 450/560s out of the box run bad. now it's beru, karlyn or bremi, if you can find them for wires, never bosch for 25 years now.