Oil pressure gauge reading when igntion is on, engine off
07-17-2012, 02:32 PM
#1
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Year: 1994
Model: Cherokee
Engine: 4L inline 6 cylinder
Oil pressure gauge reading when igntion is on, engine off
Hey guys,
I was changing oil and I tried pulling the plug off of the sender but it came off with the cover for the sending unit to get better access to the oil filter. I put it back in and at first the oil pressure gauge went all the way to the right, way past scale, when I turned on the ignition. After fiddling with it for a bit I got it to "work".
Now with ignition on, engine off, oil pressure gauge reads 10 PSI.
Is this normal or do I need new sender unit? I don't remember how it used to be.
I was changing oil and I tried pulling the plug off of the sender but it came off with the cover for the sending unit to get better access to the oil filter. I put it back in and at first the oil pressure gauge went all the way to the right, way past scale, when I turned on the ignition. After fiddling with it for a bit I got it to "work".
Now with ignition on, engine off, oil pressure gauge reads 10 PSI.
Is this normal or do I need new sender unit? I don't remember how it used to be.
07-19-2012, 04:16 PM
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Year: 1994
Model: Cherokee
Engine: 4L inline 6 cylinder
Should I even bother with aftermarket one from Napa or Autozone or get one from a dealer?
07-26-2012, 10:10 AM
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Year: 1994
Model: Cherokee
Engine: 4L inline 6 cylinder
I replaced the oil pressure sending unit with a Premium one from Napa (premium means it is not the cheapest at Napa) and the gauge shows 10 PSI oil pressure with engine off and ignition on.
And it didn't work right away. I installed it, turned ignition on and gauge went way past scale, like it does when its harness is disconnected, wiggled the wires and it works.
I have to chase that wire down. In the engine bay I had broken parking lights and headlights wires already at wire harnesses that I jumped over the harness and soldered so maybe this one is barely hanging on.
Waste of $35
And it didn't work right away. I installed it, turned ignition on and gauge went way past scale, like it does when its harness is disconnected, wiggled the wires and it works.
I have to chase that wire down. In the engine bay I had broken parking lights and headlights wires already at wire harnesses that I jumped over the harness and soldered so maybe this one is barely hanging on.
Waste of $35
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