Been having problems (rough idle, poor fuel consumption, check engine light, etc..)for a few weeks (diag codes indicate fuel injector problem and fuel mixture too rich or lean). Replaced AMM, cleaned throttle body/fuel injectors, replaced pcv, checked AMM hose for cracks).

This morning car would not start! Checked the following 25A fuse, spark ok at plugs, return hose off fuel regulator and lots of gas out, coil reads 12v ignition ON and 9v when turning over, timing belt ok. At first, when turning over this morning it "wanted to start", but real sluggish. Now it just turns over with no start indication at all.

With the gas at the fuel pressure regulator, could it still be a fuel pump? What is the easiest way to check fuel relay and pump(s)?

Any help would be greatly appreciated!