2009 Nytro XTX. HELP!!!!.

[TommyBoy791]

So Facebook has been somewhat of a help but I'm still hitting a wall here. 2009 Nytro XTX. Ran fine when parked end of last season. Started up fine periodically through the summer/early fall. Started it last week to pull it out to change fluids and got a 13, 15, 25, and 84 code. Yes I know what they are so we can skip that. I assumed the 84 was being caused by the 15. And 13, 15, & 25 are all on the same harness along the fuel rail so I've got 2 days into tracing wires and checking pins and ground blocks and cleaning every connection I come in contact with. And still no luck. When I pull the little 4 prong bridge out of one of the flat junction boxes (blue/black wire with brown stripes which tests as a good ground at all affected sensors) all codes except for the 84/TORS go away but I get an Error 1 while cranking and throttle angle shows a 98 in Diag. When I reconnect that black flat junction all my codes come back but Error 1 goes away and my throttle angle returns to 1 at rest. I'm pulling my hair out. Ran absolutely fine a few weeks ago and is stored under a cover inside a trailer. Battery is good. And I get a solid test light at chassis grounds. I'm NOT getting any ground signal at the big gray plug that feeds said fuel rail harness. I dont have any type of pinout diagram for that either. Any idea where to go from here?