Thanks for all the advice. Last night I discovered that the replacement tank pump was also bad, and replaced it again. After doing this the car runs much better, but I still am getting noticeable pump noise from the main pump and the tank pump. The car still occasionally stalls at idle, but it is much better than it was. I don’t remember hearing any pump noise before I starting having these problems, so I am concerned that the root cause of the problem has not been corrected and my new pumps will fail soon. One strange thing is I get 0 volts at both pumps when the key is in the “on” position but the manual says I should see 12 volts. I do see 12 volts at the pumps when the car is actually running.

Some have suggested I clean the IAC and throttle body I am planning on doing this tonight, but I would like to understand how this could lead to noisy fuel pumps. The stalling doesn't seem to be low idle type stall - it is acting like fuel starvation.

Could the fuel pressure regulator cause these type of problems?

The pumps I installed are from Advance Auto and the main pump looks different from the original. Could these pumps just be noisier than the original ones?

Thanks