After installing intake and exhaust what to do next? Should I reset the ECU and it will automatically reset the Air/Fuel or should i have the ECU reflashed?

 

Im not sure where people get this idea from, but recalibrating the ECM DOES NOTHING to affect a new aftermarket part install. The ECM reads data from the sensors, gears, actuators, shafts, etc in real time and makes adjustments accordingly. This process is called a feedback control loop. If there is a calibration fix or engine retune, yes recalibrate.. otherwise a stock ECM recal accomplished nothing except wasting your time.

The upstream lambda (O2) sensor reads the A/F mixture and sends that data to the ECM to maintain a stochiometric mixture. So to answer your questions....Drive like hell, no, yes, and only if its a cal fix (unlikely) or retune.

 

A lot of people reset the ECU but some believe that you don't have to and ECU will be fine adapting to the new parts itself. I think most do rest after putting on a new part.

Reflash to help the car perform much better with the part but it re-writes the stock mapping and costs a few hundred bucks.
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This is total myth... If you have the dealer recal with the stock calibration, nothing had changed. All the table values are the same, fueling is the same, cam timing is the same, compensation tables values are the same, see the pattern???? You only need to recal if its a retune or calibration fix (ie. usually to fix a problem with the controls)!!!

 

So what do I do after I install these parts? I need the car tuned correct?

 

Depends on what parts you install. If your going with intake, exhaust, HFC, etc, your really changing volumetric efficiency and need a tune thats specific to your after market parts.