My 84 Z28 tended to hesitate after quick bursts or full throttle launches, and figured that the m/c was all off because of blocked vacuum lines and no O2 sensor, so I disconnected it and now it hesitates alot less. Anyone else ran down this path? Its alot less slugglish at low RPM, but less kick dropping it down to 2nd at about 40-60. I'm trying to get the best of what I have until I get ahold of a new carb/motor, any other ideas? Thanks

 

Either give the ECM the data (as in, "sensors") it needs to properly control the carb & distributor, or get a carb and distributor that aren't run by the ECM.

There are no other choices.

 

With the MC disconnected the rods will stay out of the primary jets and it will run well beyond 'full rich'. Your fuel mixture will be off resulting in loss of power (compared to a functioning system), your motor will run hotter (more fuel is burning for the same power level), the exhaust will stink and your mileage will go down the toilet.

It may seem to idle better (at least smoother) but at the expense of unused fuel.