Well, I pulled off the intake hose and ran the car, and it seems like there is definitely a backfire or some sort of popping coming from what seems like the TB opening. What could cause this?

Remember, I just tore apart the motor to the head gaskets for a replacement...

Thanks..

 

I had a vacuum leak that caused the same thing. Check for the vacuum hose from the back of the plenum to the brake booster. If all your vacuum lines are good, then I would check the timing.

 

Hmmm... I'll have to check. I have been puling that one on and off because that elbow or t at the back of the plenum was loose, which i tighened... Maybe it tore...

 

Did you reset the timing, or just mark the dist and put it back the same way? You might have the timing off a little; that would be my first guess.

 

I was also thinking ignition, or, could be a lack of fuel (dying pump).