please help my 88 gtu is blowing egi comp fuse
 

I have a 1988 mazda rx7 gtu and when i turn the key on it blows the egi comp fuse its a 30 amp fuse I've checked all the wires and all the grounds and its still doing it I'm at a dead hault with the progress I've made i had it running the day befire it started doing this i really need help if i don't get this issue fixed I'm gutting the car and doing a v8 swap i have a small block 302 ready to go please i really need help cause i wanna keep the 13b in it