So my oil pressure is dropping to around 15 sometimes even lower at idle?

I am thinking either oil pressure control valve, regulator valve, and or metering pump? is there any way to tell, or ideas on what it could be?

 

There is a 99%+ chance that the oil pressure sender is the source of your problem. Replace it.

 

I am using the Defi oil pressure gauge and its actually only about two weeks old now and thats were i am getting the reading, thats why i am thinkin the stuff i listed above.

 

I have the same problem. On start up the pressure is OK, once warmed up, the pressure drops about 10-15psi. On acceleration it actually goes down not up. Everyone says its the front cover O ring. I tried to replace it, and still same. Not to mention this is NOT easy to do, and all for a friggn $5 O ring. Maybe the o ring still is not seated right? D says don't even use the inner front cover O ring just the white one. I hate to say for me, but I think its my rear gear bearing. It wasn't too healthy and the new one we tried to press got screwed up! I will try the front cover O ring again, and I will replace the Oil regulator. Hopefully this will work. Please post back if you found the problem, Thank you.

 

I have 180,000 Miles on rotarys and mine have always done that. As long as the pressure rises once the revs go up your fine. I think mine runs about 50 to 60 psi at 2500 rpm .

 

My gauge reads the same...........30-60 psi normal driving until it reaches Normal operating temp, then it's like the metering valve opens up or something and drops to 0psi during idle and no more than 30 psi during rev, but it's been this way the whole time I've had the car.

 

If you guys are running 5 or 10w30 oil, try changing to 20w50 and seeing what happens.

 

Why switch to 20w50?

 

it be thicker

 

word. which should raise oil pressure.

 

I had oil changed when i first bought mine. I had them put in 20W-50 just for that reason just so that i could get it home. Turns out the stock sender didn't work well under 25 psi. I compared with a instrument grade transducer and it was fine.

 

Speaking of all of this. . .I asked this on another thread and never got an answer (which I assumed meant no). Did anyone ever come up with a sender to replace the stock sender that will work with the stock gauge? I'm on my 4th sender ('93 original owner) and it's on the fritz again. Maybe they should include a sender with the filter. lol Thanks if anyone knows of an aftermarket replacement sender.