So I previously posted about a week ago and about 200 people checked it out but no comments. Wonder is if it's never been seen.... Check engine light is on, getting P0201, p0202, p0203, p0204. All came on at the same time. What I have done so far. I have changed plugs, ignition coil, air filter, wires, pcv, checked gas cap for cracks on seal, followed fuel lines from tank to filter to fuel rail and all is well there. I have looked at the injector wires for cracks /frays and they look good. The injectors are getting about 14 ohms resistance on all of them and the injectors are getting about 2.7 volts average as the voltages various as they fire at different rpms. I have also changed #1 injector just to see if it was old and I'm still getting all 4 errors codes. Where do I go next? Any ideas would be greatly appreciated and I feel like for the first time in a long time I'm going to have to take my car to a dealer.

Matt