Hi Im new to the honda world and i have ran into a problem. I jus pulled out my old d16b out of my 93 hatchback and replaced it with a b20 i got da engine bay painted and now im reattaching the wires and hoses. Now time to connect da battery it starts sparking seriously to the point that its melting the metal on the battery. What are some problems that can cause this?

 

Heavy sparking usually means a 12V positive wire is connecting to ground. It could be that you inadvertently connected a wire wrong.

 

Do you have battery (-) to the ground wire? Hooking up the battery backwards is not good. A major short circuit, maybe the starter is hooked up wrong? Disconnect and isolate the big wire to the starter then check again. Also if you have a wire direct to the alternator ("big 3" conversion) instead of thru the underhood fuse box it could be a short at the alternator. Ordinarily a shorted alternator would blow the main fuse in the underhood box.