I had my boy trying to set my launch control on my hondata S300 and when he loaded it the car turned off and the car wont idle now!!! It comes up as an iac error but we changed the iac and the plug for the iac! Its not a coincidence that we loaded the launch control and now the car wont idle someon help asap what can we do or check???

 

close the program, reopen it and upload your calibration again. If that does not work try uploading a fresh calibration form File, New.

 

if that doesnt work,
try resetting your ecu by taking the positive cable off your battery terminal, then touching it to the negative to drain whatever else voltage is stored to the ecu.