FJ60 Oil Pressure Sending Unit Question

[Chuck_FJ60]

Hey Y'all,

Well my oil pressure gauge has been at the 2/3 mark ALL the time for the last few months. I checked the oil level and everything has been fine. Just finished installing a new oil pressure sending unit, but still the same reading. Is the electrical wire/clip actually attached to the middle part of the sending unit? And what is the electrical male spade that's there for then? When I removed the old unit, the wire was attached to the center tab (thingy). I checked the FSM, but could not get a picture of how it's supposed to look.

I guess my gauge may be bad, what's y'alls recommendation?

Thanks in advance,


Chuck

[Poser]

The clip on the end of the wire attaches to the pin in the center of the sending unit. Yes it just slips on there, and seems like it would not stay there, but it will.

If your gauge did not change with the new sending unit, and you have ohmed the wire from the sending unit to the gauge cluster plug and have continuity, I would suspect that the gauge is the issue.

Good luck!

-Steve

[Cruiserdrew]

Do you mean all the time like even when it's off? On the 60, mine reads at 2/3 all the time that the motor is running. The only reason that seems weird is that my 80's oil pressure, which uses the same sender, varies all over the place depending on engine speed and temperature. If you are worried, check it with a test guage before you worry.

The spade terminal is for the later trucks. They have a ground wire that attaches there. The main sender signal goes through the center.

[Chuck_FJ60]

No, not all the time. When the engine is off the gauge goes all the way down. But when the engine's running, it goes to the 2/3 mark and stays there no matter what the revs are. In the past, while idling, the gauge would register 1/3 and rise to 2/3 when I gas it.

Has anyone changed out just the oil pressure gauge before? Our FZJ80's oil pressure gauge would go up and down as the RPMs vary up and down.

Thanks Poser & Cruiserdrew!


Regards,


Chuck

[Chuck_FJ60]

Anyone changed out the OEM Oil Pressure Gauge on an FJ60 before?

TIA,


Chuck

[lowtideride]

on my fj60 it reads 2/3 all the time except on highway speeds it drops to 1/2...

[Mike S]

The PO of my 60 had the oil pressure gauge connected incorrectly. The gauge was fried. It ALWAYS read 4/4 when running. Now it shows about 2/3 to 3/4 when driving. Follow the manual when hooking it up...

Mike S

[hj60]

Not that I completely trust the factory gauge after 21 years, but mine
always stays just under 2/3 when running. Slightly lower at idle, slightly
higher at cruise.
If you're worried, cruise on over to your favorite parts house and pick up a
mechanical gauge. You may need to get an adapter for it, but I'm not sure.
Anyways, this'll tell you what your real oil pressure is at all times.

[Chuck_FJ60]

Yeah, I'll try to pick up a used gauge cluster (left side) and change those gauges out to see if it makes a difference. Hopefully they're not too expensive. If that doesn't work, then I'll definitely hook up a mechanical one instead. I'm going to contact the local Toyota dealership to get some new parts prices also to compare.

Thanks everyone for the input!


Chuck

[Landpimp]

my fj60 reads 3/4(- maybe a tad sometimes) all the time when running, always been like that and AFIAK its correct.

If I recall the wire goes to the middle stud(if there are 2) the other is for a ground....if its used. My 3fe's and 2f's only use the center stud. If your female conector is toast, a normal(.25" I think) female wireing conector will slip right onto the stud.

also DO NOT mess with the wire or sender if the key is on, take the key out, I toasted my 45 guage when I cut the sender wire when the key was on.

Andrew the fzj oil presure is all over the place it acts nothing like a f/2f/3fe..........it can be kinda worrysome but they all act the same. My UZJ acts similar as well.

[Godhead]

I wasn't getting any reading at all and thought I had a bad sender so, my situation sounds different.

After losing any reading on my gauge I changed out the sending unit a couple of time and checked the wiring to find everything was fine under the hood. A new/used gauge from cruiserparts.net and I was back in business. Not a hard change over but you do have to remove and diassemble the cluster so, I would start with the sending unit first.

[Jman]

[quote author=hj60 link=board=29;threadid=16767;start=msg162558#msg16 2558 date=1085364982]
Not that I completely trust the factory gauge after 21 years, but mine
always stays just under 2/3 when running. Slightly lower at idle, slightly
higher at cruise.
If you're worried, cruise on over to your favorite parts house and pick up a
mechanical gauge. You may need to get an adapter for it, but I'm not sure.
Anyways, this'll tell you what your real oil pressure is at all times.
[/quote]

Ditto here, not much change.

[pvaman]

i've replaced two OEM sending units over the past 10 years. My last one only read about 1/4, once i replaced it, it stays at 3/4. It does drop down though when i'm idling.

[jhstatts]

Mine stays a little above 3/4 all the time... even at idle. I have only had my 60 for 2 days now, so I will keep an eye on it. I love this forum.

[hj60]

Uhh, change your oil.

[Brussell]

Previous owner did the V8 conversion and oil pressure gauge has never worked. It seems like I heard that if I put the Toyota sender in (supposedly is same size and thread pattern) it would work. Can anyone verify this?

Thanks!

Brad

[roscoFJ73]

The 3F oil pressure sender is the same unit used on the diesel 1HZ and petrol Corolla motors.They all have the same oil pressure
My oil pressure is in line with the others.1/3 idle 2/3 highway

[javaboy42]

Well, just to add to the fun - mine has me a *little* concerned. When I get up to freeway speeds, it tends to sit at about 1/3. If I let off of the gas pedal, the pressure goes up. It's been this way since I put the new engine in a couple of years go. But since then, the car has mostly been garaged. Now that it's actually back on the road (had to put in a new brake power booster among other things), and I am driving it a minimum of two hours a day, I need to know if I should be "concerned" or just "bugged" by this.

Any ideas and/or suggestions?

Thanks.

[87CRUSR]

I had a similar problem with the oil pressure gauge. Changed the sending unit twice and ultimately had to change out the gauge in the cluster panel itself. Now it stays at at 2/3 most of the time with minimal movement.

[dd113]

Go to NAPA and spend $30 on a pressure gauge. Hook it up, run it into the cab and drive it then record the pressure at the different RPMs. Match that with the book reading then get to worrying about why the idiot gauge does not work.

[dblake]

I've got an 86 60 series 2H.

The oil pressure gauge goes up when the car is braking or pointing downhill. It will go up to about 8/10 of the range. The gauge goes down almost to the bottom (about 1/10) when the car is accelerating or pointing uphill.

Turning corners has no effect. Other electrics in the car have no effect. No other gauges roam around.

The roaming is gradual and can take 20 seconds to go from one extreme to the other.

The oil's just been changed. I've bought the truck a week ago. There are no leaks.

Any ideas.

David

[WckedMidas]

i installed oil pressure guage this week on my 62 with 255,000 miles on it pretty shore all original miles to. Anyways it averages like 40 psi at red lights and 50 in neutral or while driveing .

[baloo]

Get a real gauge and tee into the oil sender. The real gauge will tell you whats up, you can compare that o your electric gauge. Every LC I have had did different things with the stock gauges. My current FJ 62 the oil and the temp are hyper, they move all over the normal range, but the mechanical gauges tell me everything is good. My .02

[Heartworm]

I had a mechanic use teflon plumber's tape on the threads when he put the gauge into the block. He said it was leaking before. The oil pressure reading would drop from 2/3 to about 1/3 after some highway driving. I finally figured out that the plumber's tape was changing the grounding of the unit. Getting rid of the plumber's tape solved it. Just a thought for others.

[WckedMidas]

I bought a sunproguage cluster came with
temp
oil
and volt guages
payed 27 bucks for it. Only problem was the screw in piece for the oilpressure unit was slightly difrent so we sanded the threads down alittle and got it to screw in just fine. When we took my original sending unit out it was leaking oil around the tit that the wire conects.

Now i have a question what temp should my motor be running at.I cant get it over 175 to 180 heaters working but not like i want it to. Im guessing i got a 165 electric thremostate can i pick a 180 temp one up for the winter? I did somemild rock crawling all day sunday and engine temp never went above 180 actualy stayed a hair under it

[ronbragg]

Hi,

I have an '82 HJ60 ( 2H )

While trying to remove my starter motor I have broken off a wire from somewhere & my oil pressure gauge is now dead.

The wire is yellow/black & in a black sheathing that dissappears into a black ribbed tubing. Another yellow/black wire comes out of the ribbed tubing at the same place and connects via spade clip to a sort of nut/stud with an off centre spade.

Can anyone tell me what my loose wire should be attached to?

Any help much appreciated.

[Rob Faucett]

My oil pressure gauge reads below the 1/3 mark. Full of oil, zero leaks and runs well. Does this indicate a problem? 124,000 miles.

[Pighead]

Do not panic until you check the oil pressure with a real gauge...factory gauges are notoriously inaccurate and slow to respond to changes. I tee'd in an Autometer mechanical gauge at the oil cooler so I can look at both gauges. I don't bother with the stock gauge anymore...

Originally Posted by Rob Faucett

My oil pressure gauge reads below the 1/3 mark. Full of oil, zero leaks and runs well. Does this indicate a problem? 124,000 miles.

[forestdan7]

x2 on not worrying till you know the real numbers.

My dash gauge was fried, and so was the sending unit. Old reading was pegged at the top. Replaced sender, new reading below the bottom. Really good numbers off the mechanical gauge. Got a used dash gauge and changed it out, and now it sits about 2/3, with slight up and down with temperature and RPMs.

With 124,000 miles, unless the oil has never been changed, your pressure is probably okay. But I'd definitely check it mechanically.

[Rob Faucett]

Great, thanks!! Will check directly with a real gauge. Pretend that I all I know is where the dip stick is and what oil looks like. And now thanks to you guys I know I need an Autometer. What do I do!?