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Why does 2000 Oldsmobile Alero oil light come on at idle but go off at 1000 rpm or higher after engine is well warmed up even though the oil pump and oil sending switch have both been replaced?
Wiki User
∙ 16y ago
Engine internals worn due to mileage or neglect - try a heavier grade oil
Wiki User
∙ 16y ago
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Fuel gauge always showing a quarter tank on a 70 Monte Carlo?
Sounds like the sending unit in the tank is stuck. It works kind of like the float in your toilet. There is a piece that floats on the top of the fuel and it is attached to a rod that goes to your sending unit. The higher the float, the more gas is shown on the gauge due to the position signal the sending unit is sending out to the fuel gauge. If it is stuck, it probably is best to have it replaced.
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Oil sending unit is really a misnomer. Although "it" is a unit, "it" does not send oil anywhere. What "IT" really is, is a pressure transducer. A pressure transducer is a device that "reads" or senses the hydraulic pressure of your engine's oil. That changes "it's" internal electrical resistance in proportion to that pressure. Let's say, the higher the pressure, the lower the resistance.
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Your 5.3 shows low oil pressure at cold start up and gets higher as the engine warms?
You first need to remove the oil sending unit from engine and put a oil gauge in its place, so you can check oil pressure corectley. This way you can rule out the sending unit as being the problem. ----------------------------------------------------- In my case, it was bad oil filter. before ever thinking to change the oil pump, sensor or gauge, change your oil and filter, best to make it 'flushed' (2 oil change).
