99 Honda Civic stalling out problem?

I have had my car for about three and a half years. For about a year and a half it ran great but then about two years ago it started stalling out. The first couple times it did it, it was months before it would do it again. Recently though it has been doing it more often. Occasionally it starts right back up, however most of the time it has to cool down before it starts and even then it sometimes still doesn't. We have changed the alternator, the fuel filter, the ignition module and the temperature gauge. Recently we have taken the backseat out of the car to get to the fuel pump because we though that could be part of the problem. Then someone told us to put in the new ignition module. We did that and left the backseat out. It ran good for about 3 weeks and then we put the backseat back in and it stalled again. So we took the seat out to look at the fuel pump again and didn't put the seat back in. It ran for about a month with out the seat, put the seat back in and it stalled again. I don't know if this is a coincidence or part of the problem. Also, the stalling used to occur while driving, however recently it has happened more while starting back up after waiting at a light or at slower speeds. Does anyone have any suggests? Or has anyone heard of any of these problems?

Sounds as though we have a poor connection issue with pump. Have a diagnostic check run and carry out a wiggle test with pump wires when doing so.

We have done a diagnostic test as well and nothing comes up it says there are no errors.