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Unread 09-15-2008, 11:46 PM   #1
MoonyJohn
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ZJ - Check Gauges light and oil pressure goes down?

Ok, so maybe after 20 minutes of driving I come to a stop and my oil pressure gauge goes all the way down and then the Check gauges light comes on. But when i start moving again, the gauge goes back up to where it used to be. The pressure usually starts at 45ish but then goes down to 20 in 5 minutes.

Any solutions?

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Unread 09-16-2008, 12:40 AM   #2
dcvance87
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Fuel pressure regulator is going out. Nothing to worry about. Mine does that occasionally.
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Unread 09-16-2008, 12:43 AM   #3
Ds4x4
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Not necessarily, you can replace the sender located on the engine obviously as it is easiest. but you need to check into this don't just blow it off.. I know that on my 89 Chevy p/u i have the same issue, and i need a crank kit.. there could be more to it than that, start cheap and simple then work your way to other things..
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Unread 09-16-2008, 02:56 AM   #4
vp6799
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Mine did the same exact thing as yours is doing.

I just replaced the oil pressure sending unit and it fixed the problem. I read allot about those going out so I replaced it. Haven't had that problem since.

Here's a pic and a link to one at auto zone:

Oil Pressure SWitch



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Unread 09-16-2008, 03:00 AM   #5
NorCal_96_ZJ
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I also used to have that problem...my problem was just a bad negative battery terminal wire plug/hook up.
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Unread 09-16-2008, 09:37 AM   #6
MoonyJohn
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alright, thanks everyone. Ill try ordering one of those oil pressure switches sometime in the near future.
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Unread 09-16-2008, 07:48 PM   #7
vp6799
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Quote:
Originally Posted by MoonyJohn View Post
alright, thanks everyone. Ill try ordering one of those oil pressure switches sometime in the near future.
I wouldn't wait too long to do it, because if that's not your problem then your gonna damage something else.

The oil pressure switch is just the cheapest start to find the problem. More than likely that is your problem, but if it's not and you wait too long. Your chancing a bigger repair.


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