2001 Honda Accord 4 cylinder crank, no start.
 

Hello everyone here, I am new to this forum with some diy ability, I just bought a 2001 accord with no start engine. The previous owner told me that the car needs head gasket, the car has one aftermarket key. I replaced the gasket and still no start. Could the aftermarket key stopping imobilizer to let engine start?I know nothing else about this car, except that it has 141Kmiles on the clock. Cannot reach previous owner. Any idea?