Whats the standard oil pressure supposed to be running in PSI on a 93 import wrx...

Just fitted a oil pressure guage but wasnt sure what the norm is supposed to be

 

Stone cold oil at start up, then idle should be 3bar/45psi, IIRC.

When at normal temp, then about 2bar/30psi at idle; 6bar/90psi at near-max revs...

 

hmmm mine is way out then, as its reading well over that, and not moving on rev's/idle cold warm....

Just showing a constant 125psi ish

 

Cold idle should read 6bar ish(88psi), then 2-3bar(30-45psi) warm idle, 6bar ish when driving,revs are up.
Sounds like you have a earth problem.

 

Ah earth problem... i did actually wire these to the ciggy lighter earth... should it be to engine earth?

Cheers

James

 

The sender for the oil pressure is earthed through the engine block. Is it the type that has the screw terminal for the sender wire? Mine read full scale when the wire was loose. See my garage pic for the sender on top of the inlet.

 

Mine is pretty much the same as yours... and in the same location... the pressure and sender unit is all in one, and has a wire that runs to the gauge.

 

Although the unit does touch the coolant tank... will this break it?

 

Soryy Jamz, I told you wrong cold idle figure - but still don't explain the static 125psi... Prob that earth issue, then...

 

May aswell ask what the oil temp is supposed to be too... although this one seems to work alright as i watched the temp gradually going up

 

Ive just go the same gauge as you - my oil pressure is 100+ from cold
dropping to 30ish warm idle - not sure high revs warm yet (though at as quick glance its about 100 psi)

 

Will have to keep an eye on it to see what it does when its warm