i have a 1991 ef hatch that wont crank when it gets warm/hot! but you can roll and drop clutch and will start.

This is the info on the car
-95 bottom built z6 motor
-turbo on 14 psi
-Has kill switch for after market fuel pump so its always on when u turn on key
-Also has push to start so u hold key over and press button.
-has a viper alarm that is messed up and will be took out monday.
-Battery is relocated to the rear of car and the ground wire is on the body with the paint sanded from out under it.

What i have tired
-replaced the starter (cause car kept clicking)
then wont crank (only clicked) so took volt meter and checked the starter relay and wasn't getting enough power.
-Some times u can mess with the wires under the driver side dash and will crank. (most of the time u mess with the black wire with red strip coming out the back of the fuse panel under driver dash and the car will crank.)
-went to main relay (one time grounded it with voltmeter and cranked right up.) but other times it is fine even tired my buddies good relayed we pulled out of his Da9 and still didnt work. so dont think it is the main relay.
- Car died on me once going down road. down shifted to 3rd from 4th cause light turned red so then put in in neutra to let rolll and car died. people have said that my passenger stepped on wires for ecu and thats why it died but i dont think cause he never moved.
-ecu dont fit into the mounting down holes so idk if the ecu has good ground. ecu is a P28: 92-95 OBD-1 Civic Si/Ex

Please someone help me love this car to death just some help!!