2001 park ave just killed no reaso I have fuel on the rail where should I check to fix problem

Pull both spark plug wires off of the same coil , then have a helper crank the engine over . Do you see a spark jump from one coil tower to the other ? Checking the fuel pressure you need a fuel pressure gauge to do it correctly . How did you do it ? push the scarder valve and a little fuel came out . I wouldn't go by that , should have 53-59 psi) .Also if the SECURITY light is lit the PCM/ECM will disable the fuel injectors . Also timing gears have been known to wear out . Causing engine to become out of time . Had teflon cam gear and the teflon wears and the chain gets slack . Last buick i did with worn cam gear , the customer said they didn't hear any strange noise , it just quit running . I could tell just by listening to it being tried to start . Took timing chain cover off , timing gear was worn down to nothing . More bad news piston hit a valve an bent it . Just some food for thought .