Oil Pressure Sending Unit HELP!!! - Jeep Wrangler Forum
Jeep Wrangler Forum

Go Back   Jeep Wrangler Forum > TJ Jeep Wrangler Forum > TJ Tech Forum

Join Wrangler Forum Today


Reply
 
Thread Tools

Please support our sponsors and let them know you heard about them on WranglerForum.com
Old 03-31-2013, 01:03 PM   #1
Jeeper
 
KingTJ's Avatar
 
Join Date: Nov 2012
Location: Bowling Green, KY
Posts: 148
Oil Pressure Sending Unit HELP!!!

Within the past week I've noticed my oil pressure reading close to 80. It's always fluctuated but I've never seen it this high. From my understanding, this could be the sign of my oil pressure sending unit going bad and its a common problem on these 4.0 engines. I've also read that to test the theory, I can turn the key to the on position without starting it, and if it shows anything above zero, I in fact have a bad sending unit. How accurate is that test? Because I in fact read above 40 when the key is just in the on position. I'm hoping its the unit and not something major so before I buy a new unit I wanted to make sure that mine is in fact going bad.

__________________
MPG's? What are these things you speak of?
KingTJ is offline   Quote
Old 03-31-2013, 01:17 PM   #2
Jeeper
 
Wheel2Work's Avatar
 
Join Date: Feb 2011
Location: Southern Oregon
Posts: 876
Time for a new sending unit… if the engine is not running, it can't drive the oil pump to develop any pressure.

__________________
2000 4.0l Sport, Auto, some mods done - planning more
Wheel2Work is offline   Quote
Old 03-31-2013, 01:37 PM   #3
Jeeper
 
Atthehop's Avatar
 
Join Date: Jul 2008
Location: NW, NJ
Posts: 4,017
Buy one from the dealer, after market electrical parts are not usually very good quality (China)
__________________
Retired my 94 YJ 4cyl 5spd @ 200K
Now in a 04 TJ 4cyl 5spd CV @120K+
Both as a commuter vehicle in NW, NJ
April 2012.downsized and now a 99er.
Atthehop is online now   Quote
Old 03-31-2013, 02:26 PM   #4
Jeeper
 
KingTJ's Avatar
 
Join Date: Nov 2012
Location: Bowling Green, KY
Posts: 148
That's good to hear. I kinda assumed but it was making me a but nervous also. I let it sit for about 5 hours at work and cool down and just went out on my lunch break and turned the key to the on position and it raised to 60 psi without the motor ever being turned on. Any suggestions on where to pick one up at? Best price?
__________________
MPG's? What are these things you speak of?
KingTJ is offline   Quote
Old 03-31-2013, 02:50 PM   #5
Newb
 
Navin R Johnson's Avatar
 
Join Date: Mar 2013
Posts: 7
That's good to know about it reading with the engine off. I have suspected mine was bad because of odd readings for a while and that confirms it. Pops right up to 40 in the on position. I found a Mopar one for my 02 for about $50 on line but I haven't pulled he trigger on it. Was hoping someone here could suggest the cheapest site.
Navin R Johnson is offline   Quote
Old 03-31-2013, 03:16 PM   #6
Jeeper
 
Atthehop's Avatar
 
Join Date: Jul 2008
Location: NW, NJ
Posts: 4,017
Stay away from cheap, cheap means china and you get what you pay for. Go to the dealer and ask for a discount, they will usually agree to something.
__________________
Retired my 94 YJ 4cyl 5spd @ 200K
Now in a 04 TJ 4cyl 5spd CV @120K+
Both as a commuter vehicle in NW, NJ
April 2012.downsized and now a 99er.
Atthehop is online now   Quote
Old 03-31-2013, 05:34 PM   #7
Jeeper
 
Some Farkin Guy's Avatar
 
Join Date: Jun 2012
Location: Northern Kentucky
Posts: 278
Or you could go to an auto parts store and grab one for much cheaper than that. I replaced mine last year with one from advance auto parts and have had no issues. I hate to break it to you, but even an American made electronic part is very likely going to use Chinese circuitry. Unless you honestly believe that Chrysler is not outsourcing their electrical components, in which case, I have a bridge I'm looking to sell.
__________________
05 TJ Sport build thread: My orange wallet lightener

Wife: "Did you pull through this parking lot just to look at another Jeep?"
Me: "Nooooooooooooo."
Some Farkin Guy is offline   Quote
Old 03-31-2013, 05:46 PM   #8
Jeeper
 
Some Farkin Guy's Avatar
 
Join Date: Jun 2012
Location: Northern Kentucky
Posts: 278
That was a bit ruder than I meant it to be, sorry about that. I agree with you on cheap Chinese junk, especially if we're talking about steel, but realistically you're paying for the mopar stamp by buying from the dealer. The electronic components underneath are likely exactly the same, no matter which brand you get.
__________________
05 TJ Sport build thread: My orange wallet lightener

Wife: "Did you pull through this parking lot just to look at another Jeep?"
Me: "Nooooooooooooo."
Some Farkin Guy is offline   Quote
Old 03-31-2013, 05:50 PM   #9
Jeeper
 
Full Spool's Avatar
 
Join Date: Jul 2012
Location: Calhan, Colorado
Posts: 673
Quote:
Originally Posted by Some Farkin Guy View Post
I hate to break it to you, but even an American made electronic part is very likely going to use Chinese circuitry. Unless you honestly believe that Chrysler is not outsourcing their electrical components, in which case, I have a bridge I'm looking to sell.
Even if OEM is made in china, Chrysler probably holds them to a higher standard. Even though the Chinese are well known to refuse QA inspectors from america into their sweat shop factories.
Full Spool is offline   Quote
Old 03-31-2013, 06:03 PM   #10
Jeeper
 
Atthehop's Avatar
 
Join Date: Jul 2008
Location: NW, NJ
Posts: 4,017
Quote:
Originally Posted by Full Spool View Post
Even if OEM is made in china, Chrysler probably holds them to a higher standard. Even though the Chinese are well known to refuse QA inspectors from america into their sweat shop factories.
I was just going to say this. Bad past experiences keep me out of auto parts stores for electrical parts.
__________________
Retired my 94 YJ 4cyl 5spd @ 200K
Now in a 04 TJ 4cyl 5spd CV @120K+
Both as a commuter vehicle in NW, NJ
April 2012.downsized and now a 99er.
Atthehop is online now   Quote
Old 03-31-2013, 06:07 PM   #11
Jeeper
 
Boobooo's Avatar
 
Join Date: Jan 2013
Location: Austin
Posts: 88
a couple months ago I had to replace my oil sending unit.... Did a lot of searching online and even local auto shops. While the local auto parts store had units for just about $22.00, the local jeep dealer was selling them for about $25.00 for a mopar oem... (this was for an 04 tj)
Check you local service dept - you might be surprised...
Now replacing it was a pain trying to get a wrench up there - too cramped for my big mitts... but I got an automatic so the engine bay is a bit more cramped than those with a manual...
Boobooo is offline   Quote
Old 03-31-2013, 06:15 PM   #12
Jeeper
 
Some Farkin Guy's Avatar
 
Join Date: Jun 2012
Location: Northern Kentucky
Posts: 278
Quote:
Originally Posted by Full Spool View Post
Even if OEM is made in china, Chrysler probably holds them to a higher standard. Even though the Chinese are well known to refuse QA inspectors from america into their sweat shop factories.
Maybe they do hold them to a higher standard, maybe they don't. Either way I'm not paying twice the price for the same part with a mopar stamp on it.
__________________
05 TJ Sport build thread: My orange wallet lightener

Wife: "Did you pull through this parking lot just to look at another Jeep?"
Me: "Nooooooooooooo."
Some Farkin Guy is offline   Quote
Old 03-31-2013, 06:37 PM   #13
Jeeper
 
Some Farkin Guy's Avatar
 
Join Date: Jun 2012
Location: Northern Kentucky
Posts: 278
Quote:
Originally Posted by Boobooo View Post
about $25.00 for a mopar oem
That's not too bad, actually. Someone earlier said it was $50, which is more in line with the stealership prices I'm used to seeing, and why I suggested the auto parts store. If your dealership will actually sell one to you for that price then go for it.

__________________
05 TJ Sport build thread: My orange wallet lightener

Wife: "Did you pull through this parking lot just to look at another Jeep?"
Me: "Nooooooooooooo."
Some Farkin Guy is offline   Quote
Reply

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off




Download our Mobile App

» Featured Product

All times are GMT -5. The time now is 06:04 PM.


User Alert System provided by Advanced User Tagging v3.1.0 (Pro) - vBulletin Mods & Addons Copyright © 2015 DragonByte Technologies Ltd.

Jeep®, Wrangler, Liberty, Wagoneer, Cherokee, and Grand Cherokee are copyrighted and trademarked to Chrysler Motors LLC.
Wranglerforum.com is not in any way associated with the Chrysler Motors LLC