14-54 psi at idle/ 64-78 psi at 3000 rpm
what specifications? oil pressure? horse power theres alot u need to be alot more spific
In a 1991 3.3l the oil pressure switch is located beside the oil filter
Bad oil pressure sending unit?
The 1991 Subaru 1.8 liter engine, should have an oil pressure of 40 pounds per square inch. The oil pressure can vary five pounds, either way, and still be safe.
the oil pressure sending unit is designed to warn you of a low oil pressure. If the sensor goes bad then the low pressure light or gauge will read low when the oil pressure is actually ok.
The oil pressure sensor is located behind the engine just to the right of the coil packs
Oil Pressure Sender and SwitchFord Ranger/Explorer/Mountaineer 1991-1999http://www.autozone.com/servlet/UiBr...3d800d46de.jsp
Have you change the oil pressure sending unit, that's what I had to do. David
You will have an idea that you need a new oil pump if it no longer puts out adequate pressure to lubricate the engine bearings. Use an actual oil pressure gauge to check the oil pressure, the dash light is not a reliable gauge. Also make sure the oil filter is not choked with dirty oil and restricting pressure. The final determination if you need a new pump is to check the clearances in the pump itself. To check the clearances look in a manual such as a factory service manual, a Chilton manual or a Haynes manual. They should have helpful illustrations as well as the clearance specifications. You could also check the pressure relief valve, it might be plugged up with sludge
it is under the distributor.
The factory owners manual recommends 20:1 fuel to oil ratio.
Most likely the oil pressure sending unit is defective, replace.