car stalling out during left hand turns. won't start without pumping gas pedal.

What is your question?

No check engine light, no codes, ever. So i don't think it is a sensor. Car stalls randomly turning left. If it does not stall you can feel it bogging down most times. Right turns are fine. Also cannot start the car without giving it some gas. Problem didn't seem to start until my girlfriend drove it into a "deep puddle", as she calls it. The car stalled then but she was able to restart it and get it out. I checked the intake, and throttle body, cleaned everything up, sensors included. It helped the idle, which was real rough but didn't fix the occasional stall. I'm thinking bad fuel pump, or at least a dying one. The fuel gauge is all over the place while turning left and the problem is more pronounced on 1/4 tank or below. Though it will stall with a full tank.I'm getting ready to put a fuel pressure gauge on the rail but thought I would bounce it off you guys also to get some input. I'm not a certified mechanic but I am very knowledgeable with cars and things mechanical and fear no fix. haha. I have done just about everything on a car. Also, when the car stalls, it takes multiple attempts to restart it. I won't let her drive the car until I fix it as I fear her getting hit as she is turning left through an intersection. I really hope it is not electrical, I really hate tracing wiring and grounds. I just figured if it was that or a sensor it would pop a check engine. If it is a slowly going bad fuel pump, I didnt believe it would pop the check code. so that, with the hard start led me to the fuel pump. any ideas?