I have a 350 tpi formula firebird. I can crank it up no problems and sometimes it will hit instantly and other times it will take a few seconds. But anyway after it warms up it will not start until it cools down(about 5 mins or so). I have replaced the ignition moduel, pickup coil, I have checked the vapor release valve, plugs, plug wires, maf and have set the timing. So could heat soaking be the problem, I didn't think it was the problem because it has stock manifolds. Or could it be the VATS key system? Please help!!!

 

Is it turning over or is it like the starter not engaging. My 89 5.7 gta had a proble, that I thought was the vats but once I replaced the starter it corrected the problem. I had an issue with the car turning over 4 or 5 times to start but it turned out to be a dirty clogged fuel filter.