need electrical help quick.

[derek33 10+ year member]

Im replacing the wires to and from my battery with 4 gauge(had it laying around and couldnt fund for more 0 gauge)

yesturday i replaced:

ground to chasis

ground to engine block

+ to fuses

leaving the the + to alternator.

today i planned on finishing up my install.

now whenever i go to connect the + to alt i get alot of sparks and smoke comes from my distributor cap.

everythings all connected but this one wire

even if i undo the grounds and connect that wire, then re connect the grounds i get the same sparks and smoke.

whats going wrong???

thanks

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[Vestax 10+ year member]

Check it with a DMM.