Stalling right after starting
 

Hello all:
My car is stalling about 2 seconds after I start it. It is random and is not really related to hot or cold. After the stall I will turn the key to off position and then proceed to start again. And then it is fine. I had a powerchip installed last week. The problem just started yesterday and has happened maybe 2-3 times. Do you think it's related to the powerchip or could it be fuel pump issue? Any ideas?:)