Hello
I have a question about the fuel pump in my 02 cavalier 2.0 liter. The car left me by the side of the road about 8 months ago, wouldn't crank. I replaced the fuel pump. Car cranked fine for about 3 mos, in the last 4 wks, on a cold morning sometimes the car will spin but not start. I can bump the gas tank under the car and it will start. My question was, is this most likely the pump again or the connector(harness)?

Also, i noticed the last time it did this, when the engine was spinning as i was starting, that there was an intermittent chatter under the dash, just under the steering wheel, sounded just like a relay that was not contacting properly, when I got the car started and went down the road, I still heard the chatter a couple of times and it went away. What does this sound like?

thank you very much for your help
chris