I think I have a bad oil sending unit but I'm not sure. Occasionally my check guages idiot light comes on for just a second then clears. When it does my oil pressure guage drops to zero. Is this the symptoms of a bad sending unit or what? Oh yeah, it mostly happens on hard breaking. WTF?
Oil sending unit? Are you referring tosensor that reads oil pressure? If so, that could be the problem.
I have had vehicles before that read a large drop in oil pressure when the vehicle is either stopping suddenly or gets articulated at a steep angle on the trail. Usually it is cuase the oil all sloshes to one side of the oil pan or the other......if it can't read pressure then it might mean that you are low on oil and when it sloshes to the other side the oil pump can't suck it up....just a thought, but check the oil level.
Mine did that before the motor died. I was burning up oil. When the oil level droped and a hit the brakes hard, the idiot light would come on and the gauge would go to zero and the truck shut off once in a while. If your oil is full, I d try the sending unit.
I was driving down the interstate one night and looked down and had NO oil pressure... I stopped and listened to the engine and she sounded fine... it would get pressure at speed but when I stopped The gauge would fall to zero... drove it like that for a year. changed the sending unit and it fine now