So I have this rattling and can't figure out what it's coming from. I checked for the heat shield and it's not that. I'm having a difficult time figuring out where or what its coming from. Any and all help would be amazing.

 

Rather impossible to tell over the internet. You have provided very little information to guess on.

So lets play 20 questions, shall we?
Can you hear it when idling stopped not in gear?
Is the car and Automatic or Manual transmission?
Do you only hear it when moving?
Does it change with RPM?
Does it change with speed?
Can you hear it when standing outside the car?
Can you hear it only inside the car?
Does it sound metallic?
Does it sound plastic?
Does it sound like it's from the front of the car?
Does it sound like it's from the back of the car?
Does it sound like it's from the drivers side of the car?
Does it sound like it's from the passenger side of the car?

I think you get the idea of just how blind we are in comparison to you whom can actually witness the rattle first hand.

 

Front, passenger, metallic, 2-3k rpms and idiling, manual, when braking and getting up to speed. That's when its the loudest. Can hear it more inside the car than outside but still able to outside.

 

Okay and what car are we talking about, a 92-95 hatchback, coupe or sedan? A 94-97 Del Sol? Or a 96-98 coupe, hatchback or sedan or a 99-00 coupe, hatchback or sedan?