I backed into a curb one day and my exhaust got fk*d up so i replaced my flexpipe and some other pipes underneath, after that i hit my exhaust again by backing up into a big bump now my car idle is low and when i drive the idle goes so low that it sounds like its gonna die, my car sometimes jerks back and forth when i drive, what do you think could be the problem im getting sick of it HELPP!!!

 

i says it neither the exhuast or tb. sounds like the car is struggling with fuel issues.

 

check your o2 sensor for damage.

 

^^^what 98vtec said and take out your reverse gear.

 

I'd check again after the second time you bashed it to make sure the exhaust pipe isn't creased anywhere restricting the flow....

 

I'd invest in some rear view cameras if your going to keep on doing that lol

Any other sypmtoms?
Has anything else been done to the car either by you or a mechanic recently?

How low does your idle sit when warmed up when just sitting there in neutral ?

Why do you think it could be your throttle body anyway? Unless you REALLY rocked your motor (being the exhaust is attached to the motor at the header) which maybe by some means would some how transfer the impact energy to your TB? I just don't see that being likely.

What about a huge exhaust leak? Would that cause any issues that the op is experiencing?

O2 sensor would be the only thing in the exhaust that would mess up your fuel, so the 02 sensor would be the first thing to check I would think.

As far as the jerking back and fourth is that when your getting going? Or does it happen even lets say when your on the highway?