From the moment you turn on the vehicle, it changes in two ways: 1. When it is cold and the oil is cold and thicker, it needs more pressure to pump the oil through the engine. You will notice a change in the oil pressure at idle when it is cold and at idle after the engine has had a chance to warm up. 2. The higher RPM the engine has to operate in (such as going through speeds 1, 2, 3, OD, or flooring it to pass someone), the more lubrication the engine will need and thus the higher the oil pressure. As soon as the engine slows down, so the oil pressure lowers.
Your oil pressure goes up with more throttle (higher rpm) and there is less pressure say at idle. Therefore your gauge reading will vary according to the throttle/rpm.
The oil pressure gauge is going to fluctuate on a Toyota Tacoma or any automobile. The oil pressure is less when the auto is idling and more when the auto is going down the road.
Low oil. Just driving steady, it will drop as you drive, because the oil will change thickness as it warms up, reducing pressure
what would cause a oil pressure gauge to fluctuate on my 99 Chevy truck silverado i change the sending unit it does it mostly after it warmed up
Correct. The oil pressure does fluctuate throughout the RPM range.
The oil pressure gauge will fluctuate on a Chevy Tahoe when the vehicle is idling and when the vehicle is driven at highway speed. Idle is usually 30 psi oil pressure or slightly more. At highway speed, the oil pressure should be between 60 psi and 80 psi.
The oil gauge shows the oil's temperature. The oil pressure gauge monitors the oil pressure for your viewing pleasure.
Connect the wiring harness to the back of your oil pressure gauge. Secure the oil pressure gauge with the retaining screws.
It goes up while driving and down when you're idle....that's normal
Defective gauge, defective oil pressure sending unit, low of oil, defective oil pump.
Six-year the oil pressure gauge for your 1999 Mitsubishi eclipse with the retaining screws. Connect the oil pressure gauge wiring harness.
"T" into the existing oil pressure gauge with brass pipe fittings. This way you will have the original oil pressure gauge and the mechanical oil pressure gauge. Don't forget to use thread sealer.