Oil Pressure Sending Unit - Ford F150 Forum - Community of Ford Truck Fans



1987 - 1996 F150 Still running strong! Talk about your 8th and 9th generation Ford F150 trucks.

Oil Pressure Sending Unit

Reply
 
 
 
Thread Tools Search this Thread
Old 03-30-2012, 06:54 AM   #1
Senior Member
Thread Starter
 
mrslyfox's Avatar
 
Join Date: Dec 2011
Location: Iowa
Posts: 785
Thanked 6 Times in 6 Posts
Default Oil Pressure Sending Unit

I have read through a bunch of previous threads, sounds like the sending unit is the culprit. Truck runs great, 5.0 engine, however the fake oil pressure gauge reades just on the right side of N of NORMAL. Sometimes it will jump up and sit right in the middle of O, and sometimes between N and O. From what I have read, this is a pretty common thing, and the gauge isnt really a gauge at all. However, its one of those things that you would like to see it back where I think it should be, just to the right of straight up and down. A new sending unit is super cheap, however the location of it looks to be a booger to get to. I am sure many of you have done this to your trucks, any suggestions that might make this easier? Does it require a "special" socket to remove the factory sending unit? Can just barely see the darn thing.. .havent tried from underneath, maybe that would be easier. Pretty sure thats what it is... just replaced my water temp sending unit, it was doing the same thing. Dont know why they ever put a "dummy gauge" in.. not much sense in that.
mrslyfox is offline   Reply With Quote
Old 03-30-2012, 01:16 PM   #2
Senior Member
 
Join Date: Oct 2010
Location: Charlotte, NC
Posts: 2,416
Thanked 143 Times in 124 Posts
Default

If your truck is a 5.0L/302..........

They are cheap and very easy to remove to if you remove the oil filter. You will need a special socket to remove it or if you are handy with vice grip pliers, you may be able to get it off by using those.
qdeezie is offline   Reply With Quote
Old 03-30-2012, 02:50 PM   #3
Senior Member
 
Join Date: Jan 2011
Posts: 696
Thanks: 0
Thanked 6 Times in 6 Posts
Default

Just keep in mind that your sensor might not be the problem. It could be reading perfectly and your pump is just weak or the engine is worn and not providing good pressure.
joshtowal is offline   Reply With Quote
Old 03-30-2012, 02:59 PM   #4
Senior Member
 
Join Date: Jan 2010
Location: Roanoke, VA
Posts: 461
Thanks: 0
Thanked 1 Time in 1 Post
Default

None of that would affect a simple on off sender. It either works it it doesn't. I'd be more incline to suspect weird electrical issues in the gauge or cluster.
fastpakr is offline   Reply With Quote
Old 03-30-2012, 04:33 PM   #5
Senior Member
 
Join Date: Oct 2010
Location: Charlotte, NC
Posts: 2,416
Thanked 143 Times in 124 Posts
Default

Quote:
Originally Posted by joshtowal View Post
Just keep in mind that your sensor might not be the problem. It could be reading perfectly and your pump is just weak or the engine is worn and not providing good pressure.
I totally agree. Take my truck engine for instance. If I was at a stop light and the engine was hot, the gauge would go down to zero pressure. As soon as I take off, the gauge would move back to the normal range. My engine ran well, but I knew it was worn out mainly because the previous owner never changed the oil and it was caked with sludge.

The fun of it, is I bought it specifically to rebuild the engine and was able to get it running well prior (minus the suspect oil pressure) to tearing it down.

I hear people say "dummy" gauge and I understand that, but I still think that it has to see a certain amount of pressure to function.
qdeezie is offline   Reply With Quote
Old 03-30-2012, 04:49 PM   #6
Senior Member
 
Join Date: Jan 2010
Location: Roanoke, VA
Posts: 461
Thanks: 0
Thanked 1 Time in 1 Post
Default

That is correct,I believe the number is 7 psi but not sure. The op didn't ask about the gauge going to zero though, he asked about varying pressure indications. That's not a pressure issue on a binary sender.
fastpakr is offline   Reply With Quote
Old 03-30-2012, 09:46 PM   #7
Salvage Yard Pro
 
unit505's Avatar
 
Join Date: Feb 2012
Location: Keithville, La
Posts: 2,541
Thanked 120 Times in 107 Posts
Default

Sorry to argue guys, no special socket needed. Either a 27mm or a 24mm socket. It's dark and I don't feel like digging through the tool box. Like $5 at autozone. Buy your sending unit and go fit it to a 24 or 27mm socket. I'm almost 100% sure it was a 24mm. Both my 4.9 and 5.0 have had the sending units replaced in the last month and the metric socket did the trick without breaking a sweat.

EDIT!
Since I'm such a nice guy, I went and checked..........27mm 6 point socket. The alleged special socket was like $35. Screw that crap! I pissed Autozone off when I went and fitted the sending unit to one of their $5 sockets.

Last edited by unit505; 03-30-2012 at 10:12 PM.
unit505 is offline   Reply With Quote
Old 03-30-2012, 11:32 PM   #8
Member
 
Join Date: Mar 2012
Posts: 59
Thanked 1 Time in 1 Post
Default

Quote:
Originally Posted by unit505 View Post
The alleged special socket was like $35. Screw that crap! I pissed Autozone off when I went and fitted the sending unit to one of their $5 sockets.
Oh, I love it when solve your own problems right before their eyes.
autocar is offline   Reply With Quote
Old 03-26-2017, 05:27 PM   #9
Junior Member
 
Join Date: Mar 2017
Posts: 1
Thanks: 0
Thanked 0 Times in 0 Posts
Talking Oil Pressure Sensor

Had the same issue described above with my 2012 F150 Lariat. No Pressure at low (Idle) but would return upon throttle of > 1500 rpm. Changed the oil with new oil filter, same scenario....Replaced the oil pressure switch/sensor and cleaned the connector with Electrical Contact Cleaner and upon immediate start-up problem resolved...


Upon inspection of the old sensor found a small amount of sludge at the entry point of the sensor and noticed oil residue built up around the electrical connector, not sure which was causing the issue....But $12 fix, I am not complaining.....Thanks for the forum....
ScottyXRay is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
F150 302 rebuild Curtis McCarty 8 Cylinder Engines 9 02-28-2016 01:04 PM
Another P0012, but maybe a little different KwitcherBitchin 2004 - 2008 Ford F150 17 09-15-2015 08:22 AM
VCT solenoid operation cabinetmakermm 2004 - 2008 Ford F150 12 09-09-2015 11:34 PM
ewb needs 911 help doctruptwn Maintenance Shop 4 09-08-2015 10:29 AM
Mechanically Illiterate HELP HornFrog44 General F150 Discussion 0 09-05-2015 02:59 PM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

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



All times are GMT -4. The time now is 11:45 AM.


Copyright 2006 - 2017 F150Forum.com
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: