So I've had some issues with my oil pressure reading ever since the oild change place broke my sensor. They installed a new one, but that one went bad after 3 or 4 months.

When the replacement went bad, my pressure spiked to past 80. I originally thought it ws the gauge, so I replaced that last week and still had the same issue.

So, I picked up a new sensor from Advanced Auto Parts and installed it last night.

Here's what happens now.....

- Before start up, gauge reads over 80 (just sits that high, on or off)
- turn ignition to ON position, gauge drops to zero
- start engine, gauge spikes again

Anyone have any idea what is causing this? Is it another bad sensor? Did I not screw the sensor in tight enough? How tight should it be?

Such a simple item......I just want it fixed already!!

Look forward to any info anyone can provide. Thanks

 

It almost sounds like the gauge is grounded out. When I was looking into replacing the garbage factory unit I read that the gauge pegs at full pressure when grounded. This solves any CEL issues if you go with a mechanical gauge and ditch the factory crap.

 

I actually have a similar problem. Mine is spiked over 80 while off and when I turn it on it spikes even further. But some one told me that I probably have the wrong sending unit. I bought mine from autozone. I'll have to look up the thread I started a while ago but he explained it perfectly. I just have no money right now to go out and buy a new one. When I'm at my computer I'll try and pull up the threAd for ya.

 

unplug the wire see what gauge does guys

 

Good call, I'll have to do that and see what I get.

But here is the thread I was talking about.
https://www.cherokeeforum.com/f2/oil...-switch-78481/

 

and after we unplug the wire what will the out come tell us,if the gauge still pegs the problem is with what______________. and if the gauge does not peg what will this tell us_______________.

 

Gauge. Its a sending unit issue.


Or what other words could I fit in there?

*****. Panties.

 

wire unplugged gauge pegs wiring issue to ground.......gauge does not peg un hooked is oil swithc/sender issue come on guys

 

Gotta tell you that I have seen more than a few issues with aftermarket sending units.

I buy plenty of aftermarket parts, but the oil pressure sending unit is one of the items that I purchase directly from the Jeep dealership. Worth the extra money. Around $61 for the last one I fixed, if memory serves me.

 

Will test this out tonight.

When I had the old one in, I did this test and it seemed to stay pegged no matter what.

With this new unit, I at least get the needle to drop to zero with the ignition in ON position.

If it is infact a ground issue, are there any write-ups on repairing this without going to an aftermarket manual sending unit?