Ok so im driving on the freeway. Downshift to 4th gear to start puling and go around a semi. While accelerating heard a loud pop. Kind of sound u hear when u release presure. My car starts and dosent knock. But when i put it in first it whon accelerate it will choke

If maf is good and it's 3.5, how much does everyone wanna bet a precat blew up and is now clogging up main cat?

knew that was coming lol. Best bet is to remove exhaust and inspect for debris. Hopefully nothing got sucked back into your motor, if it wad a precat going out youll want to watch for increased oil consumption.