Hi,

I have an 87 TA with a 350 carbed manual fuel pump, electric fan. I hooked up wiring for sub amp and it melted and shorted out on the manifold. It blew a whack off fuses which i replaced now the engine will run a few seconds after I turn off ignition switch. It seems to run ok just doesnt shut off immediately like it used to and is annoying me. Any ideas thanks in advance. I just got this car so I am unfamiliar with what happened to the wiring when they swapped the motor to an older 350 vette engine from the original 305 tpi automatic

 

the most common cause is wiring the electric fan to the ignition system.
when the fan looses power, it acts like a generator supplying enough power to the coil to keep the spark going for a few seconds.
running the fan off the ignition also robs the the ignition system of power and can kill the ignition module.
use a relay to supply the fan with power from the battery.