You need to get the fuel pump to turn on.
IN the on position of the key, there should be a wire that when tested stays on during engine cranking. That should be the fuel pump lead. the alarm probably needs to be wired into this with the remote starter.
Do you have the wiring diagram for the car? That would help.
But I believe that isthe principal for it.
I would also post about this in the car audio forum, scott from La jolla Audio always has a good answer.
I havent done many alarms, but I have a friend who told me about this, should be similar for any car, but there might be a good place to tap into the wiring for it I don't know about.
'92 300CE - Sold
2004 C240 - C7 Wheels
2015 ML350 - P1, Pano, Ash poplar wood, Sport Dinamica interior, Running Boards Keyless go.