Hey all I'm having a small problem with my 91 cherokee not having any oil pressure. I rebuilt the pump to no avail. What next? any help is appreciated. Thank you.

Lucas

 

pressure sensor?

 

Did you pack the pump with Vasoline?
Cut the handle off an old standard screwdriver and use it in your drill to prime the pump. You'll know when your moving oil because the drill will bog down.

 

I did not pack it with vasaline but I did put a drill to it and it pumped oil.

 

Try replacing the sensor or using a mechanical gauge to verify the pressure.

 

I just went and got a new sensor, so now I have to find and replace it. Will keep posting. thank you very much for the help.

 

It's right next to the distributor.

 

I'm pretty sure you'd know if you really had no oil pressure. It'd sound almost like a lawn mower.

 

more like a sm jack hammer or desiel and there is no oil in oil filter. getting ready to start it again with the new sensor. here we go

 

If that is what your truck sounds like and your oil filter is dry, you have no oil pressure.

I am pretty sure replacing the sensor will do anything. Take it back before installing and get your monety back.

 

Prime it again while someone watches the gauge with the ignition on. If you are moving oil the gauge should show pressure 9assuming the sender is good).

 

Was the gauge working previously?

You may have to have the key on to see the gauge move. Its electrical, not mechanical.

 

is there another way to prime it without droping the oil pan? And no the new sensor didnt work but the old one was pretty grimey.Thanks for thw help all

lucas



and yep the gauge was working before

 

This sounds like you have a blockage...hopefully just a bit of sludge gumming things up.

Drain your oil, but leave the filter in. Pour in a gallon of kerosene, start it up, and watch your gauge carefully. When it starts to heat up it will zoom FAST, so make sure you're ready to shut it down before it burns up. Won't take but a half-minute or so. Check your filter. If it isn't full of kerosene, let it sit for a couple of hours, then run it through again.

Drain the kerosene and swap out the filter. If sludge is your issue, this will likely fix it. If not, your oil pump still isn't working right.

 

I've heard of this and using trans fluid to accomplish the same thing.

Both make me nervous.