Ok ill be driving an all of a sudden the pressure gauge will go to zero . Theres no engine noise . I can shut off motor an restart it an it will act normal for a while then start doing the same thing . I figured since i live in mich an drive short distances to work ill change oil often . I use mobil 1 an still in winter ill change it every 1000 miles due to the water build up in oil .The truck only has 63000 miles aon it an i really dont think the bearings are gone yet .Trying to see if anyone has had this problem with oil sending unit acting funny like this
Have you tried replacing the oil sender switch on engine yet?
SOURCE: oil pressure problem
You oil pressure sending unit has gone bad, it's common to go bad and some even leak oil.
The oil pressure sensor is on the back of the block on the passenger side, you can get to it from the top and not from the bottom. There are (2) switches back there that screw in to the block and you can only see it from the top of the engine. The Oil Pressure Sending Unit is the one wire harness with a green and white strip on it. The other switch has more wires to it.
When you pick up the new sensor, make sure you get the right one. make sure you get the Oil Pressure Sending Unit which sends variable oil pressure and has only one quick connect for the wire connector. The oil pressure switch is the one that only activates the oil light on older engine.
Once you get the right part at Auto Zone for around $9.00, disconnect the wire clip with the green with white strip on it. and use a deep spark plug socket with a extension and u joint to get the sensor out. The sensor comes with teflon tape already and no oil should leak out from the block. It as simple as replacing a bolt and reconnecting the wire connector.
Good luck and hope this helps, take no more then 10 min to do but about 5 hours for the engine to cool off LOL
SOURCE: 360 motor losing oil pressure after15min of running
Try hooking up a mechanical gauge to make sure you have a problem.
SOURCE: sudden change in oil pressure gauge
It is normal on a Chevy for the oil pressure guage to fluctuate based on the rpm's of the engine. The faster the engine is turning, the higher the pressure. If it is fluctuating without a change of engine speed, then you may have a REAL Big problem such as low or no oil in engine or the oil pump itself is going bad. Could also be a blocked oil filter. You surely change your oil regularly....right?
SOURCE: 2006 dodge durango stalls at slow speeds loss of power
there is a rubber diafram in the throttle body see if is worn out.and if dirt is deposited there.
SOURCE: oil pressure fluctuating
The sensor could be failing to read the lower pressure when the engine RPM slows down. Or the pump could be failing. I would replace the sensor and see if that doesn't correct the problem
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