Audi s4 2001 won't start after loud pop underhood and exhaust

[Lakotiy]

So I just got a s4 b5. Pulled out on the street and paddle to the metal and shifting from 2nd to 3rd loud pop under the hood and in Exhaust and the car shut off. I bought the car two days ago, it had few codes when I scanned it with vag com. It was coolant temp sensor, cat converters/ 02 sensors, and multiple mis fire. I had a chance to change the coolant temp sensor and drove it about 20 miles after changing it and this happened. The car was making loud belt, pulley or fan noises when It ran, like usual German cars but a bit louder. I managed to sneak by fingers thru the timing belt covers and the belt is still attached properly but isn't as tight as is it should be. Please help me out here. Thanks in advance

[Seerlah]

Loud pop while punching it sounds like an intercooler hose busted off the piping. Check it out. And def address your louder than normal front end.

[flips4]

Loud pop while punching it sounds like an intercooler hose busted off the piping. Check it out. And def address your louder than normal front end.

THis,
happened to me too. just screw pop it back on and tighten it down.