I've got a 98 EK I bought with a b20b already swapped in . Car is running obd2a . Car has been randomly dying on me , usually a slap or two to the lower side of the dash and it fires back up ( a friend showed me that trick ) I think it's probably a relay issue as I've been told they have problems .. How can I properly diagnose this and where might I locate the main relay ? I can say when the car dies it's the fuel pump the quits .. You can hear it kick back on when you hit the dash .. This is my first Honda .. So any help would be greatly welcomed

 

Ignition switch harness, replace it.