First at all do you heard a click under the dash when u turn on the car?..(no when the engine is on, just the lights on the dash)..cause the main relay is the one in charged on sending the electrical signal to the fuel pump.
it cost $44.80.+shipping (i bought mine there)
http://www.hondaautomotiveparts.com/...IT+%28CABIN%29
item #: 012
I have the same engine, and let me tell u, if u have any problem just let me know...and i can help u out. jejej I have had all kind of problems with mine...but thanks god I have fixed it all. u know after 204.000 miles running anything can happen jejej..
About the temperature sensor, I guess maybe it's normal to get warm up after 3 mins. Where are u located? cause here in florida..in 2 or 3 mins jeje is ready to go ejej...during the spring season..it takes a little more..maybe 5 to 6 mins.
if anything let me know..