92 Cavalier won't start

Hi, My 92 Cav ran fine one day. Would not start the next. It turned over fine but not getting any fuel. Replaced the fuel pump and fuel relay, still won't start. Was thinking about replacing the pressure release valve but someone said there is a reset switch on the passenger side behind the foot board. (Never heard of that before) So. If indeed the little sucker is back there would it be necessary to reset the switch upon installing a new pump? Any ideas you could give me would be greatly appreciated as I am now pretty much at a loss. It is a 2.2 liter engine with 150,000 miles and up until now ran like a champ. Thanks again. Boogie
PS if you think the injectors may be the culprit. Any quick fixes to clean them up? :D