INFO
99 civic 3 d cx
00 coupe ex engine wire harness
obd1 to obd2b jumper harness
jdm p72 ecu

problem :
wel my main relay go crazy after I turn the key on the On positions (III) like cliak,click,click,click,click

the car cranks the fuel pump go on but when I'am cranking it fires a few times and the it shut off ? lol anyone have any idea of what could be this ?

 

Thermostat housing ground. Check that, along with the other grounds.

 

check grounds for sure...my main relay did the same thing on after my swap