I just had my heads redone on my 1988 Nissan 300ZX Turbo because the timing belt wore out as soon as I purchased the car from a friend. It bent 5 valves. I have it back together but now it will not start with the key and when I get under it and use a screwdriver it will crank over but still will not start. I turned the switch on before I tried with the screwdriver. The Security light is flashing and I think that this has something to do with it not starting. Has anyone else ever had this problem before? I need help.

Thanks