High oil pressure with engine off!

[dwhitaker]

Hi all, I have noticed high oil pressure on my new Chim since I got it a few weeks ago, but today got it over a pit to do some testing (thanks V).

The strangest thing - and possibly pointing to the problem, was that with the ignition on, but engine off, the gauge reads 30psi. Disconnecting the sender it drops to zero.

This implies to me a faulty sender ("off resistance" too low), but could someone please just check this on theirs? Mine is 1998 serp. Putting an Ohmeter on it though I see 324 ohms, which seams about right. A bit high if anything.

I also wondered what might happen if the earth connection was missing off the gauge, anyone any idea if this could be the case?

[TJC46]

Sender is knackered.

They were not very accurate in the first place.


Have a read of the link and purchase one off ebay. You will have to run one of the terminals to earth, but it gives a better and more accurate oil pressure reading.

http://www.pistonheads.com/gassing/topic.asp?h=0&a...

[Mr Supercharged]

Look here, page 4, my graph. This should make it all self explanatory. If not, PM me.

http://www.pistonheads.com/gassing/topic.asp?h=0&a...