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It sounds like you got a defective pump. What brand is it and where did you get it? Also check and make sure none of the wiring to the fuel pump got damaged and isn't shorting. As for the idle, the engine is supposed to idle higher cold than it does when it's warm, that's normal. Although yout claimed cold idle numbers are a bit high, and your claimed hot idle numbers are a bit low. Typically it should idle cold at about 1000rpm and hot at about 750rpm. I would clean the throttlebody. Clean the idle valves at the back of the intake plentum. And clean the connections for the MAF sensor and coolant temp sensor.
Realistically it seems that you have no clue how to diagnose any issues or possibly even what it means to diagnose an issue. Did you check the fuel pressure before you threw a fuel pump at it? You need to know WHY it would die on you occasionally. You didn't bother to figure that out and now it's screwed up in a different way. I would advise you to find someone in your area who CAN diagnose it and try to learn what you can as he does it.
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