91z put vats by-pass in it after the ignition switch would not take the code in the key chip. when you drive it and it gets to normal operating temp the car will stall out. it will start back up and you can drive it. it stalls pretty much every time you come to a stop. only started after installing the vats by-pass. any suggestions would be appreciated. probably will install a new ignition swith and key if worse comes to worse. thanks

 

stalling has NOTHING to do with the VATS, VATS effects starting only(kills the starter and the fuel injectors)