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I'm also having fuel pump issues. Car starts fine in the morning, but by the afternoon I've got no fuel pressure. Fuel injection repair centre thinks it might be the relay, but all in the box are fine.
Are there any other relays, or worse, could it be the becm?
Lift the lid of the fuse box in the engine bay and find Relay #12. Remove it. This operates the fuel pump. Find relay #6 which operates one of the HEVAC blower motors. check that it's OK and put it in place of relay #12. See if fuel issues persist... or not.
Usually the relays referred to have a bright yellow casing. Check to see if they have brown burn marks from extended use. This is a known issue with relays operating the fuel pump and especially the blowers. Any sign of brown marks signals time for replacement.
Do a search on this site and you'll find reference to aftermarket relays available locally, which will do the job. suggest you buy ones with diode protection to prevent voltage spikes.
cheers