Probably not as big of PITA as not running as it is now. At the FRP sensor I am recieving 5 volt at the 5 volt ref .01v at the low ref and 5 volts at the middle wire (sensor) Is that normal?
This is not normal. IMO you have a electrical problem. The fuel rail pressure sensor has a 5V supply, Ground, and Signal wire. You should not have 5V on any 2 wires at anytime unless you have 29,000 plus psi of rail pressure. Cranking is definately not one of this conditions. Now that being said, you need to find which wire to the sensor is the 5V reference which should be pin A or 1 on the connector , pin B or 2 should be ground and pin C or 3 should be signal. Now without looking at a wiring diagram (I am going off memory here) most manufactures will run a common 5v reference and common grd to several sensors. If one sensor shorts internally it can cause 5v to go to both the common 5v reference wire and the common ground wire. The easiest way to troubleshoot this is to check the wiring at the fuel rail pressure sensor, find which wire has 5v on it that shouldn't (ground or signal) and begin unplugging other engine sensors while monitoring voltage at the fuel pressure sensor. When voltage drops to .02 or less you have found the bad sensor. It could also be a short in the wiring harness. Easiest way to find this possible problem is to perform a wiggle test, which is just what it sounds like, wiggle the wiring harness while again monitoring voltage on the wire at the rail pressure sensor that should have not voltage, when it drops you have found the general loacation in the wiring harness that the problems lies.
What all did you have off during the injector swap? Is it possible that a wire got pinched under the valve cover during the valve cover swap? Have you checked the wiring harness on the passenger side where the LLY's have the harness rub issue.
But again IMO you don't have a mechanical issue, it is electrical.
Hope this helps.
Good luck,
Jerrod
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