2000 Chevy Blazer fuel pressure

Welcome to the forum. 60-66 psi, key on engine off.

Idling, 50--63 psi.

After cutoff, pressure shouldn't drop below 26 psi for at least a minute.

thank you for the info,this thing is driving me up a wall.it was towed in for no start ,after seeing what looked to be original cap wires i did a complete tune up on it,it runs great when it runs.(only when warm) if it sits outside overnight(we live west of chicago)it will not start ,fuel pressure with key on is 60, i can hit it with a little starting fluid and it will go,then it will start fine till its left out overnight,no codes are comming up on scanner,all lights are off when running.my uncle suggested maybe a problem in the security system,

Hi, is the security lite on or flashing, when you try to start? Passlock is injector disable, you can use a noid lite on injector plug, see if it flashes. Also, the injectors and fuel poppets may need cleaning. The best cleaning procedure is a shop procedure.

security flashes till i put yhe key in,then stays on in the on position

The security lite flashes without even using the key? Doesn't make sense, maybe I misunderstood? Is there an injector pulse, engine cranking?

Key on, engine off, my info says the security lite would stay on three seconds and then go off. If it is your security system, there should be some manufacturer specific codes?