Packard Forum Index » V-8 (1955-56)

The original sender which I kept ,I did clean it up and put it back in the car, works on the first startup after the car sits for a day or two, but then the needle slowly goes back to 0. I think my next step is to run a new wire from the sending unit to the dash gauge and see what happens.

I tested the continuity of the orig wire and it is good. I then used a new wire to go from sending unit to gauge and I got the same reading. So now I'm going to try locating another oil pressure gauge to see if the pressure stays constant.

My 400 is the same way; the electric gauge worked when I bought it but it stopped working after a couple months. The previous owner already installed a mechanical gauge mounted below the dash.

Would like to have the electric one work again at some point. IDK yet if it's a connection or sensor issue, and IDK if the sensors can be helped by, say, cleaning, or if they just need replaced.

Well as a follow-up the car is working great. The only things that need to be addressed is that it has a power steering leak and the carb needs to be adjusted. I still have not found the reason that the oil pressure gauge works intermitentily. I'm considering buying a cheap electrical oil pressure to verify that the oil pressure sender is working because I think the dash gauge may be faulty. All the other gauges seem to be working properly. Also I have added a low pressure electric fuel pump back by the tank to allow the car to start easier after sitting for a while.