Home Ford Ranger Forum Tech Articles Other Articles Featured Rangers Readers Rangers Classifieds Shirts & Decals Parts Store

Ford Ranger Discussion Forum  

Go Back   The Ranger Station Forums > Help Forums - Engine & Transmission Forums > V6 Forums > 3.0 Liter Forum

Reply
 
Thread Tools Display Modes
Old 11-10-2017, 08:52 AM   #1
91stranger
Member
 
91stranger's Avatar
 
Join Date: Jul 2010
Location: ohio
Posts: 145
Vehicle Year: 1999
Vehicle Make: FORD
Vehicle Model: RANGER EXT CAB 3.0
I use this vehicle for: daily driving
Rep Power: 15
91stranger is on a distinguished road
Default oil pressure issue

started my truck this morning, weather was about 30-35 degrees but no frost on ground. oil pressure was low, like barely raises when starting the truck. truck started, idled, drove just fine. about 5 minutes of driving down the road it jumped up to normal and stayed normal. now I've seen a lot of issues with these sensors on these. Could it be something simple like a bad sensor? is there a way to test this without replacing a bunch of parts? I am a decent mechanic and can take on most issues but this is the only vehicle I have to drive and I work full time. so I cant be without my truck. Anyone know where this is located? I replaced a knock sensor on my 1991 ranger a long time ago. not sure if this would be in a similar area. my truck is a 1999 3.0 2wd, auto trans. Thanks for the help.
__________________
1999 ford ranger 4 door, 2wd, tow package, 3.0 auto trans. sweet ladder rack, daily driver.
91stranger is offline   Reply With Quote
Forum Notices (Not shown to 'Premium Members')

 SPRING ONLINE MAGAZINE!

 Check out the latest articles

 Want to become a Premium Member & not see these notices? Click HERE.

Old 11-10-2017, 10:53 AM   #2
RonD
Member
 
Join Date: Jun 2012
Posts: 10,572
Vehicle Year: 1994
Vehicle Make: Ford
Vehicle Model: Ranger
Rep Power: 47
RonD has a brilliant futureRonD has a brilliant futureRonD has a brilliant futureRonD has a brilliant futureRonD has a brilliant futureRonD has a brilliant futureRonD has a brilliant futureRonD has a brilliant futureRonD has a brilliant futureRonD has a brilliant futureRonD has a brilliant future
Default

Ford switched to oil pressure switches in late 1980's
The oil gauge is just on or off there is no movement by "pressure"

The switch is open when oil pressure is under 5psi, 0 on gauge
Switch is closed when oil pressure is above 5psi, gauge at "normal", depends on what resistor they used in your year.
So at 10psi or 30psi gauge stays in the same place, on or off

On the 3.0l the oil switch is on the passenger side of engine, back behind the head on the block.

Your oil gauge change could have been electrical issue, this is why you may see gauge rise with RPMs, if alternators voltage regulator isn't working well the voltage in system goes up with RPMs, so oil gauge needle would also go up, it is similar to volt meter in that respect.

But it could also be the switch is having internal resistance issue, it is the Ground for the gauge, when closed, so if the switch or its wire gets extra resistance then oil gauge needle would be lower.
RonD is offline   Reply With Quote
Old 11-10-2017, 01:16 PM   #3
91stranger
Member
 
91stranger's Avatar
 
Join Date: Jul 2010
Location: ohio
Posts: 145
Vehicle Year: 1999
Vehicle Make: FORD
Vehicle Model: RANGER EXT CAB 3.0
I use this vehicle for: daily driving
Rep Power: 15
91stranger is on a distinguished road
Default

The oil gauge didn't move with the RPMs. It was low when I first started the truck. When I shut off the truck, I could see the needle drop a little like it did show a different reading other than on and off. I just didn't know if maybe the cold weather affected this. I was wrong on temperature. it was really about 20 degrees this morning.
__________________
1999 ford ranger 4 door, 2wd, tow package, 3.0 auto trans. sweet ladder rack, daily driver.
91stranger is offline   Reply With Quote
Old 11-10-2017, 05:26 PM   #4
Rearanger
Member
 
Join Date: Feb 2008
Posts: 1,279
Vehicle Year: 2003
Vehicle Make: Ford
Vehicle Model: Ranger 3.0L
Rep Power: 22
Rearanger is on a distinguished road
Default

The only way to check oil pressure is with mechanical gauge.

I installed an AutoMeter electric gauge shortly after buying the truck. It shows variations in oil pressure. You'll find the access is not the best but I Tee'd off the stock on/off sender so I get both the stock fake needle and my real pressure gauge. Used a pillar gauge mount from HERE

THIS site has small digital electric oil gauges that may be better to mount on the dash.
__________________
2003 3.0L Long Box, 5spd Manual, 2wd, 3.73 LS,
P235/70R-16, Synthetic fluids, Dual by-pass oil filter system, 81.5k miles
Rearanger is offline   Reply With Quote
Old 11-10-2017, 08:52 PM   #5
RonD
Member
 
Join Date: Jun 2012
Posts: 10,572
Vehicle Year: 1994
Vehicle Make: Ford
Vehicle Model: Ranger
Rep Power: 47
RonD has a brilliant futureRonD has a brilliant futureRonD has a brilliant futureRonD has a brilliant futureRonD has a brilliant futureRonD has a brilliant futureRonD has a brilliant futureRonD has a brilliant futureRonD has a brilliant futureRonD has a brilliant futureRonD has a brilliant future
Default

Quote:
Originally Posted by 91stranger View Post
The oil gauge didn't move with the RPMs. It was low when I first started the truck. When I shut off the truck, I could see the needle drop a little like it did show a different reading other than on and off. I just didn't know if maybe the cold weather affected this. I was wrong on temperature. it was really about 20 degrees this morning.
If it moved up, even a little after start up and you didn't hear lifters "ticking" then your oil pressure was fine.

When key is on, engine off, oil needle should be on "0" pressure
After startup needle should move up, how far is moves is not really important from an operational standpoint.
It is in essence an Oil Light, on or off

If you are used to it being at a certain place on the gauge then replace sender/switch on the engine, not uncommon for these to need replacing.

Cold oil is very thick, and oil sender can get clogged up.
RonD is offline   Reply With Quote
Old 11-10-2017, 09:30 PM   #6
pjtoledo
Premium Member

 
Join Date: Oct 2007
Location: Toledo Ohio
Posts: 894
Vehicle Year: 2000 2005 199
Vehicle Make: Fords
Vehicle Model: Rangers Taurus SHO 5spd
I use this vehicle for: going to Cabelas
My credo: get outta my way, I'm falling!
Rep Power: 23
pjtoledo will become famous soon enoughpjtoledo will become famous soon enough
Default

my 2000 with a 3.0 has had the flakey oil gauge for over 10 years. stays low and jumps up to normal a few miles down the road. sometimes its borderline and switches low-normal and back several times a second.
the fix is a clockwise rotation of that knob on the dash marked "volume"
pjtoledo is offline   Reply With Quote
Old 11-13-2017, 04:54 PM   #7
91stranger
Member
 
91stranger's Avatar
 
Join Date: Jul 2010
Location: ohio
Posts: 145
Vehicle Year: 1999
Vehicle Make: FORD
Vehicle Model: RANGER EXT CAB 3.0
I use this vehicle for: daily driving
Rep Power: 15
91stranger is on a distinguished road
Default

Seems like it only happens on really cold mornings. Also found that if I give the motor a good rev then the gauge jumps right to the middle where it normally is. Probably just think cold oil on a cold start up. Never had one this sensitive. Been waiting on an RV to get off our lift to be able to get a really good at it and make sure everything is what it should be. Its only got 106,000 miles so its still a young truck when compared to other vehicles I've had.
__________________
1999 ford ranger 4 door, 2wd, tow package, 3.0 auto trans. sweet ladder rack, daily driver.
91stranger is offline   Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

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

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Fuel pressure issue 2trux 2.9 Liter Forum 8 08-21-2015 11:54 PM
Wierd oil pressure issue JoshT 4.0 Liter Forum 3 09-18-2014 11:45 PM
oil pressure issue Baby Raptor General Discussions 4 12-03-2012 05:56 PM
Oil pressure issue Terry 2.9 Liter Forum 7 02-27-2009 05:53 PM
Oil Pressure issue Danger-Ranger96 4.0 Liter Forum 6 11-02-2007 03:33 PM




All times are GMT -5. The time now is 03:11 AM.




1999-2014 / 959 Media LLC / All Rights Reserved