Glad to see the PSI measurements. Back to the electrical troubleshooting. Are you headed for the gauge and cluster next? I think you ruled out everything under the hood.
Recommend change out the transmission fluid. Although it looks fine on the dipstick, remember it is a hydraulic fluid that helps store energy to move gears, clutches, etc--this fluid and its properties wear out over time. Replace the fluid--it sounds like its time.
If I was a thief reading this forum: starter cutout and fuel cutout sound like the most reasonable places I would go--along with every other car forum on anti-theft. Not giving away secrets, think of the signals that require our engine to start. Hint: Can you start our LC if its in drive...
It doesn't hurt to verify. I'll keep an eye on the thread to see your progress. Agreed- if oil pressure is good, turn to the cluster for troubleshooting; you've eliminated everything else.
John, This is Will across the way in Bahrain. I recommend you stop running your engine and open up your oil pan. I spent 3 weeks chasing what I thought was a bad oil pressure sender and wiring--same problem- I was watching my oil pressure gauge slightly move. I was too late ignoring it and I...
After oil changes, new filter, new sender unit, verifying wiring and gauge operation, listening to the engine, observing splashing inside the oil cap/spout, clearly seeing no leaks, and spending hours on IH8Mud with endless 'low oil pressure forums', I to will "Not worry about it". I'm done...
Similar issue when I had a dirty Idle sensor (throttle body). Removed, cleaned and improved, but not perfect. Did not become 100% until I had fuel injectors rebuilt/cleaned.
thanks for your photos, I was curious how the noise filter was attached. Glad to see its just 'taped' to the wiring harness. I thought I was missing a bracket or something... Great work.