Im sorry i never got back with you my phone broke. im sorry i did not run race fuel it was a lucas octane booster. And im stock right now. But have heads,intake,cai,maf,cam,roller rockers,throttle body,new fuel pump,24ibl injectors,headers,msd idgntion,bama chip,but was trying to get this problem fix before i added all this.change the plugs to copper motorcraft plugs and made a world of diffrence. but still bogs down i think i have a fuel problem. Thanks for the help.