k so i just got it back from shop, had to have a rear differential rebuild. My problem is that the car idles really rough (some points coming close to stalling) and when i go to accelerate on a hill (either backing out of my drive way or going forward in the coldersack i live in it stalls but starts up again when i restart it. could this be a bad fuel filter or there something else, car is a 89 camaro rs with 305 engine TBI.

 

If the battery was disconnected for any reason your IAC may have to relearn it's settings.

 

it was but cars been doing this since i got it back from shop, before i disconnected battery and that was to add a shim to positive lead cause dude before me stuck wrong size terminal cable on lol.

 

You might try this out.
https://www.thirdgen.org/tpimod2
Just one of many excellent articles in the technical articles section worth checking out

 

bad fuel filter seemed to of been the issue, had it swapped out and now car runs fine, i still think the issues i had the other day where a result of me unhooking battery, i forgot how those ECU s can be, but it seems everything is ok now. I just need to tighten the Tie rod bars and ball joints a bit and car should be good for most part.