engime stalls when stopping and bogs down when accerating

If you have no cel on then look at the IAC valve at pass side rear of throttle body. Unscrews after unplugging connector with a 1" wrench. This load compensating device can get gummed/carboned up and can be cleaned with brake clean and reinstalled. Be very careful with the very thin gasket. If breaks then will have to get new valve which it may need anyways, cleaning does not always fix, will need to drive after to let it recalibrate. Have the fuel pressure and volume checked. How old are tune components?