is there a shut off switch on a 91 chevy blazer if the oil gets too low?

Answer 1

I don't believe there is a shut off switch it just runs really bad until you put more oil in. I ran mine really low once and it sounded like an old V8 until I put more oil in then it ran like a champ.

Also really depends on which motor you have my experience is with the 4.3 not the other motor.

Answer 2

Most cars only have the low oil pressure light on them. The service engine soon light comes on sometimes.

I have seen cars running on virtually no oil and it makes you wonder why there's no "kill" switch when you hit a certain volume but this is most likely for liabilty reasons. If it malfunctioned someone would sue or the oil was low but the car was driveable and they needed to get some place regardless of the oil level they'd sue.

Most cars will run for quite awhile with no oil. This is helpful if you hit something in the road and split the oil pan.

What typically happens is the friction between the piston and the cylinder walls reaches a point where the friction wins and the engine stalls. This doesn't mean the engine is totalled but on a very old engine that has had low oil pressure for many years the rings might fuse to the cylinder walls when or if there is no oil pressure.

Good Luck!

Answer 3

Cars do not generally have a shut off switch for low oil that would create a dangerous condition if it were to shut off in the middle of the highway or something. There should be a light to alert you to the fact that oil pressure is too low.

Answer 4

The oil pressure sending unit supplies power to your fuel pump after the ecm stops supplying power.In other words, when you start the engine, the computer powers the fuel pump.After the engine starts,the oil pressure sending unit keeps the fuel pump powered and the computer turns off it's power to the pump.The idea is that if your oil pressure drops,the fuel pump will quit.They can cause low fuel pressure because they dont supply enough current to run the fuel pump at full speed.

Answer 5

yes it does.

if you start the engine and the computer doesnt see oil pressure after 5-10 seconds it kills the engine to save it from oil starvation.

Greg S, you obviously dont know jack **** about these trucks.
they have 2 oil pressure sending units, 1 for the guage the other to read pressure to kill the engine if there isnt any.

Answer 6

yo jeffyukon i got some bad news pal the oil sending unit doesn't keep your fuel pump running it simply is a back up power source for the fuel pump in case the fuel pump relay goes bad when it hits around 30psi the fuel pump will turn on.I will bet you anything you want you can start any gm you like and break off the oil sending unit and the car will run