If this is correct then your situation is more serious than you think. Think of it as your blood pressure, that's not good is it? Check your oil level with the orange dip stick. If your oil is at the top of knurled part of the stick it will tell you at least you have some oil in there, it should be lower once the pump is operating.
If it's way below the stick, this will tell you oil is below the level where the oil pump pick-up is at. The pump is not able to pick up oil from the oil pan and starving your engine which could end in a very expensive disaster.
If your level is fine and it does this, then you may have a
- Oil pump faulty
- Oil filter very dirty
- Oil filter faulty
- Loosing oil pressure due to internal system blocked or leaking externally or internally
The procedure for diagnosing oil pressure problem is using an analog oil pressure gauge connected to service ports from both the bottom and the top end of the engine. Without running the engine, a tool to turn the oil pump manually and pressurize the system while reading the gauge data.
One thing for sure.....DO NOT START YOUR ENGINE UNTIL YOU ARE SURE YOU HAVE OIL PRESSURE!
Doing so will damage your internal moving parts and may seize the engine from oil starvation.
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