I've still got my 86 T-Top GT. I have the heads back on and running/cooling beautifully EXCEPT when I restart her after 20 min or so of idling she has issues restarting. Spins over like a wild banshee so I don't think it's a starter heat soak issue.

Basically she'll restart if I hold the key for 6-8 seconds or so, if for some reason I don't hold the key that long when I try to start again while hot I get nothing.

The compression is 160-170 across all 8 cylinders. E6 Ported/big valve heads with 93 block.

I have spark and power to the injectors I cannot see the injectors toggling though when this happens, but I don't have a noid light any more so I'm just using a test light which the circuit may not be enough to light the bulb.

If I let her cool down she starts fine.

I have a new fuel pump, filter, ignition switch, coil, ignition module, pickup, distributor, starter, starter solenoid, iac, tps, cap, rotor, coolant and iat sensors (replaced them all when I redid the heads since most of the equipment was OE or old as hell )

I've tried a new PCM relay from a running car and another A9L PCM as well

I replaced most of the ground wires with upgraded wires and the EGR system has been removed.

I have an extra injector harness from a running car I'm going to try tomorrow. I'm a Fuel injection and computer guy but this is stumping me all to hell

Any ideas from some of the more seasoned Mustang guys out there?

FYI It's a MAF conversion with 24lb injectors and a Pro-Flow 24 lb MAF with a 70mm tb, cobra upper and lower intake as well....