well i'm driving my truck i hit about 3500 rpms then shift into 3rd and its starts knocking so i thought well it has alright oil pressure so i shut it off and checked for something hitting the fan but everything checked fine so i started it up and it was knocking from the front of the engine so i thought screw it so i toke of and floored it and it went away. i drove it about 100 miles so far and beat on it and it still runs fine i was thinking the fuel pump but it sounded like a rod bearing like my old engine had wut u guys think?