Re: Oil pump change on 56 Packard 400

Posted by Ernie Baily On 2023/11/3 13:48:29

I decided to just install the cleaned up orig. oil pressure sending unit on my adaptor. Well it worked for about 5min. After start the needle came up and stopped at the correct location that would be read as approx. 65psi. It stayed there and then the needle jumped and slowly went back down to 0 and never came back. This make the second sending unit to do that. The oil pressure dash gauge, the temp gauge and the gas gauge work off of a common power wire with a 5volt reducer. All the other gauges on that line seem to be working fine. I'm puzzelled!

Has anyone run into something like this before?