Oil Guage Fluctuations The oil guage indicates the lubricating oil pressure in the engine. Unless the sensor, guage, or its electrical circuit are defective, the drop and rise indicated by the guage are showing lowering and rising of the engine oil pressure. These fluctuations could be related to changes in engine RPM [revolutions per minute], or defects in the guaging system.
I'd say you have a ghost with ya.
sounds like the cam bearings may be going bad
first you need to drain the oil then you unbolt the motor mounts and lift the motor up as far as it will go. unbolt oil pan and drop down as far as it will go then reach your hand up and unbolt oil pump drop pump in pan and slide pan out. put new pump in pan and slide pan back in bolt oil pump back up and then put pan back on and bolt motor mounts back up.
Found out this can be cause by a faulty oil pressure switch best known as oil pressure sending unit
Low oil, no oil pressure, bad sending unit, wiring, bad gauge,.............
oil pressure normally will go up and down with rms for the most part. when the motor is cold there is more oil pressure as the oil and motor get warmed up the oil thins out and the pressure goes down.
There is a 1/8"npt port on the back rail of the block near the distributor hole.
normally the oil pressure switch is on the main block if you have a pressure guage or oil pressure light on the car if you disconnect the right switch the gauge will drop or the light will go out then you know that's the switch to change.
assuming there is no abnormal noise (knocking or rattling), and this happens independent of engine rpm, and you are inferring this from the gauge reading, it sounds like either 1. bad sending unit (common) 2. faulty wiring (common) 3. bad gauge (least likely judging by your description)
Physically check the engine oil level with the dipstick to confirm the engine is full of oil. If the engine is full, the oil level sensor or wiring to it may be at fault. If the level is low, go back to where the oil was changed and complain.
yes!!! they can always go back to school and some do!!
I would check the oil pressure sensor to see if it might have gotten disconnected some how. Might want to check the viscosity rating of the oil that was used. Some cars are really picky about the weight of oil. take it back to the dealership if they were the ones who did it last. Let them know of the problem asap and make sure you let them know that they were the last ones to touch the car.