Got a stumper here... My Oil Pressure Gauge is not working properly. The car is a 48 Deluxe 22nd series 2211. I have done all the tests. Grounded the wire to the gauge turned key and needle bottoms out at 80 like it should. Tested actual oil pressure with a proper gauge and when car turned over needle instantly hit 40LBS perfect! So that tells me the actual sensor is no good. I have replaced the Sensor with Napa Parts OP6742 and ECH OP6091 both from the Cross Reference Parts File with limited success. OP6742 sends the needle to 80 when car is turned over then slowly goes to 0. Again, I have done multiple tests with an Oil Pressure Gauge all confirming proper operating pressure. Second, I used ECH OP6091 this worked for a while but gave varied results. Needle would go to 80 then settle to 40 then to 60 when driving and now 0. I even went so far as to try a NOS part from EBAY with no luck either. All electrical connections have been checked and cleaned and secured to make sure I have good connections as well. So that said I am stumped!!

Does anyone know what the modern replacement part would be for 309525 DUST SHIELD-DIFF DRIVING PINION UNIV JT FLANGE. I have checked the cross-reference file and no luck. Its for my 48 22nd series model 2262 Thanks!

Those are some of the best, clearest, and cleanest dash pics I have seen! Thanks so much for sharing they really help in identifying where things belong. I appreciate you sharing!

So a bit of a update…. I started at the front with my volt meter checking battery cables which checked out. Then checked the carb switch again checked out. Then I contorted myself and began undoing each connection behind the dash whether I felt it needed or not. Cleaned each post, cleaned the nuts and the wire connections. Tried starting the car and success. For now…. Will keep everyone posted and again thanks for all the extremely helpful advice it pointed me in the right direction.

I think you hit the mail on the head! When the headlights come on the AMP meter needle buried itself completely on the discharge side. I checked all the connection on the ignition switch and they are clean with no corrosion. I do feel a short is occurring somehow some where.

Nope they are super clean. Made sure not only are the posts clean but the wiring is clean and in good working order. No corrosion or dirt.

Just a quick addition…. The battery is at full charge and when I reconnect the terminals and flash the voltage regulator I get nothing. No spark… yes I am touching only the battery and generator like the instructions say for a Delco voltage regulator.

We have a new twist to the plot! I checked the ignition switch wiring and connections and all are clean. I then started up the car all was good for about 4 min when I pressed the headlamp switch for the headlights the engine died and I have zero power to the car not even enough juice to light the courtesy lights.

Thanks tomorrow I will do the dreaded maneuver under the dash and check out the GA wiring to see if it is clean. Then move to the starting switch.

Exactly the same for me… when cold all the way to the floor. When warm barely touch it and she fires right up. Unless my dreaded issue occurred and then I get nothing no mater how far down I push the peddle or how many times.