ecu power relay, fuel pump relay? these are fairly common, if theyve gone fooked it wont go,, does the fuel pump run when you go to click 2 on the switch...

other thing is if the donkey has been out,, a loos earth connection, what are the 2 earths like on the inlet manifold at the back at the bottom ? are these loose or corroded OR got silicone sealant around them

others to check, main body earth where the battery neg goes to the inner wing, are these nice and clean?