It might be the MAF sensor but you would most likely get a code for it. I would also suspect the IAC motor. That IAC adjusts the idle speed and what u're describing is definitely a possible defect. If you havent got a code I would take a good look at the timing. Take off the top cover of the timing belt and rotate the engine to T (TDC) the marks from the camshaft should line up. If it doesnt match at first rotate the engine another spin. Draw a straight line from where the dimple mark is on the belt closest to the sprocket across to see if it matches where the mark is on the engine. Might have jumped a tooth. Another little trick I learned is that if u suspect the MAF, try hitting it or flicking at it with your finger to see if it upsets the engine. If the engine reacts then you've found the problem. There is a way to check the MAF with an ohmeter. Go to autozone.com and check under repair guide. They should have it.
Also check the timing of the engine. You have to find the Timing Ground Terminal to properly ground the engine and then hook up your inductive timing gun to check the timing and adjust the distributor accordingly.
Another thing I would do is adjust the valves. I think cold the intake should be .007 and the exhaust valves should be at .009 but double check to make sure. Improper valve adjustment can have an adverse affect on engine performance and can cause issues. Another thing i would do is make sure the firing order is correct, the second terminal on the cap from the left is the number 1 then 3-4 and the 1st on the left is the number 2 spark plug wire. 1-3-4-2 firing order. Good luck let me know if I was any help.