ok everyday something else goes wrong with my car and i barely beat it, i drive like a grandma. lately my car has been running like crap, it doesnt pull at all. something is seriously not right. now when my car idles it would make a loud pop from the exhaust like backfiring. what can cause this noise while idling? can a boost leak do this?

Boost leaks cause you to run rich, and richness causes you to backfire. That's a possibility.

+1
check for boost leaks

check for boost leaks check your spark plugs you could be misfiring from shot spark plugs

i did check my spark plugs, im the first owner and my car has about 18,500 miles. they didnt look too bad but im not sure how to really tell.