Quits at idle after revving high

I have a 99 tacoma with a 3.4 L automatic with 160,000 miles. For the past year my truck will idle rough and quit after revving high. After driving around for a few min its fine until I accelerate hard and get it up to about 4 to 5 thousand rpms. I recently changed the timing belt and accidentally got it about two teeth off. While it was like that, it didnt have much power and it was very loud, but it didnt have the problem. Once I fixed it and got it timed right it started having the problem again. I hope someone has had the same problem and knows what is wrong.

I have a feeling its the alternator. It makes sense. When it started to quit, another problem started. When I turn on my lights (4 130w, 2 55w) the gas gage would go down. So I'm thinking the problems are connected.