Fuel Guage Goes Up Then Partly Fades -- 72 Swinger

More progress. Last night, I put in the RT Engineering IVR. Sure enough, the weird behavior on the gas gauge went away, and the resistor test checks out great with about Full @ 10ohm, Half @ 20 ohm, and and empty at 70 ohm. This is all good news. I am a little angry that the IVR that Classic Industries is selling was a dud (probably just bad luck but its crap to buy a new part that doesn't work correctly). With that sorted out, I just have to burn through this tank of gas until its almost empty so that I can pull the garbage Spectra sender and install the NOS Mopar sender I have.

The sad news comes with my temp gauge. I confirmed that the temp sender wire was continuous from the sender itself to the instrument cluster plug. I now know the IVR is good. And yet the resistor test does not get the temp gauge to move. So in this case, I now think the actual temp gauge is busted. Not a huge deal -- I have several other temp gauges -- but damn it I don't want to pull the dash cluster out yet again :(.

I'm torn between 1) wanting to tear open the IVR from CI to see what exactly it is that they sold me 2) returning it to CI and getting my $15.99 back, or 3) chucking it into the trash, writing a bad review for that item and moving on with my life.