Well lets just assume the sensor is ok if it reads something like 500 ohms back.

On the top plug (the one to the ecu) see if you got a good ground between it and the battery using the ohms part of the meter should be around 2 ohms. If its open line somehow your ground got busted.. a short intern fix would be to reroute the ground to the chasis.

 

yeah loctite isnt necassary. and if you have to go back in there again youll regret using it

 

Probably not but it was used by the manufacturer so I'm inclined to do it anyways.

 

alright so if you look at the plug side that goes to the ecu like a wall socket with the two horizontal plugs as the top and the single slot as the bottom: the top left got a reading of 3.95ohms, top right got 0ohms and the bottom got a reading of 0.08ohms. This is with the positive/red tester touching the socket and the negative/black side touching the negative/black terminal of the battery.
And if you flip that so the prongs that go to the sensor also are like a wall socket with the side with two on top. If I touch the red tester to the top left and the black tester to the top right it reads around 10.95ohms. All other combinations do not register any resistance.
This is all done with the multimeter set to 20k ohms.

 

Your meter definitely puts out strange values I wonder if its broken. The values shouldn't switch around when testing for resistance unless its a diode and that shouldn't be the case with a direct wire to the battery.

It really does seem like the sensor and plug is in order. I'm surprised it wont fire course with the meter being so inconsistent its really hard to draw a solid conclusion.

 

These are all the same resistances that i got with the 20k ohm setting as a few days ago. still completely lost.

 

Okay if i were going to try and move the ground how would i go about doing that?

 

splice and run it from the sensor to the chasis somewhere

 

Okay so i think i figured it out. i unplug the sensor and checked the voltage coming and going from the ecu and everything read good; ~12v and ~5v. i plug in the sensor and instead of the ~12v and ~5v it should read everything reads the same. every single wire read the same as the battery voltage. i even tried to do what was suggested and ground the sensor to the chassis. no start still. i'm thinking that this means the sensor is bad.