02transamls1

I need alittle bit of advice. I have replaced my alternator. I check all my grounds and found that the previous owner had ran the ground strap from the bottom of the block to the top smh. Guy built a 550hp motor and did some retarded crap like that. So anyways I fixed that issue but even with that issue fixed and the alternator replaced its still over charging. Any help would be much appreciated.
also having issues with my fuel pump gauge jumping around not being accurate. It has also been replaced