I will try to be as brief as possible and tell you what I have already done.
1. New spark plugs / wires
2. New Fuel filter
3. Lines have been treated with chemicals (over and over again)
4. Tested the Idle Air Control Valve voltage from the pcm which was fine. Ran radio, heat, air, power steering, and could not get idle air control to make it stall today... so I don't think that is it.
5. Battery is definitely a big old, and dies on cold days, but is okay
Here is what happens
1. Mostly on cold days, but not always, could be hot day too, car tries to stall, sometimes just when starting up, most of the time when driving. When you try to accelerate (sometimes), it will hesitate start bucking, and feel like it is going to stall. If you keep pushing the gas pedal it will not increase speed no matter how hard you push the gas down when this happens, and I gradually have to slow down with my flashers and pull off the road and restart the car and try to drive home at 10-30 mph as it won't usually go over this when the problem occurs.
Here is what I didn't do, I did not change my fuel pump. Does anybody think it is the pump? Or something else. This is all becoming a lot of money to fix and mechanic has failed a few times at it. My wife just wants the car fixed or sold. She thinks it is such a simple ordeal, but then again attractive women think that things are so easy. She said she would call her guy friend to come fix it, but don't really want him over you know what I mean lol. My wife is very attractive.
Thanks. I will barter help with my skills, I can remotely fix your computer or diagnose it for you, or other issues. I also have a diverse background in construction and can barter my advice.