yes i just received a 1989 iroc with a 350 motor drop in and i open the doors and/or turn on light everything works fine, i put in the key turn to accessories and fans and gauges all come on then when try to start motor all power turns off and wont come back on??? it has a anti theft unit put in it and i was wondering if maybe this could be causing my problem or what please if anybody knows anything that could possibly help i greatly appreciate it the name is Riley and you can contact me at my email at rileyschuyler@insightbb.com thank for your time

 

Try turning the key back a little after the engine starts up. Not to the point the car turns off. I had a car, not a Camaro, that when I started it the gauges, fan motor and blinkers would not work. After a few days I realized if I turned the key back towards me a little everything came back on.

I would think if it was an alarm issue it would kill the starter. Let us know what works.

 

need more info. Does the car actually run? TPI? Is the anti theft device an aftermarket unit?

 

if all power leaves when you try to engage the starter, check all the battery connections, and check the battery condition(load test it)