Fzj80 temp and oil pressure (1 Viewer)

[ZblackliZard]

Hello, I have a couple of questions about the fzj80. So both my friend and I have fzj80s. I have a 1993 fuel injected automatic one. And his is a 1995 carburated manual.
So once reaching operating temp my gauges are as follow:
Oil pressure: at the middle at idle arround 3/4 when running about 3000rpm and arround the top when on full throttle.
Temperature at the middle stable.
His gauges show the following:
Operating temp: 1/4 level
Oil pressure under 1/4 level when operating and iddle (his idle is pretty low arround 600-700 rpm)
His oil pressure usually stays under half level.
So my questions are: is my car too hot or his too cold? Is my oil pressure to high or his to low?
Or am i missing something?

 

[BTLSHP]

Needle gauges are near useless. On oil pressure the needle position will vary by whether you are using Toyota's original sender or an aftermarket sender. After that, oil weight makes a difference.

Coolant temps are best read with a ToyobdI device on the ‘93 and an appropriate diagnostic reader on the ‘95.

 

[Kernal]

Agree re the gauges, but if your oil pressure is actually that high (pegged to the top) under load then one possibility is that your oil filter
may be operating in full bypass mode.

What oil filter size/brand is installed and how many months/miles/kms are on it?
What oil type/viscosity are you using?

 

[ZblackliZard]

Agree re the gauges, but if your oil pressure is actually that high (pegged to the top) under load then one possibility is that your oil filter
may be operating in full bypass mode.

What oil filter size/brand is installed and how many months/miles/kms are on it?
What oil type/viscosity are you using?

I've changed oil and filter to stay on the same values. I'm currently as follow:
Oil filter: bosh 3330 from rockauto
Oil: eurol 10w40 turbosyn
It has about 1000 miles or less on it and about 2 month on it.

 

[ZblackliZard]

Needle gauges are near useless. On oil pressure the needle position will vary by whether you are using Toyota's original sender or an aftermarket sender. After that, oil weight makes a difference.

Coolant temps are best read with a ToyobdI device on the ‘93 and an appropriate diagnostic reader on the ‘95.

Any link to a toyobdl device couldn't find one? I think both of us have toyota original senders. And use the same oil.

 

[Malleus]

You need actual gauges. You screw them into position replacing the electronic sensors. If you can't get them locally, you can find them online. The oil pressure sending unit is on the right side of the engine; it's the bell-shaped sensor. The water temperature sensors are on the head, on the left side, under the intake manifold.

Relying on the signals from the ECM introduces new variables into the problem.

 

[BTLSHP]

Any link to a toyobdl device couldn't find one? I think both of us have toyota original senders. And use the same oil.

TOYOBD1 :: Online Glossary

TOYOBD1 This is the current application, it allows you to see and record the information listed below with an interval of about 1.3s betwee...

jfbreton.blogspot.com

It does not help with much, but IMHO the coolant temp is worth the price of admission. VAF & O2 sensor data is also worthwhile.

Link to store:

zf-scantools

Web Store Meta Description

zf-scantools.com

 

[Mat Jadamec]

The oil gauge can be checked for function via an FSM procedure. You have to pull the instrument cluster. The procedure uses a fault indicator bulb from the cluster to represent the signal current. I still only rely on it as a pressure function gauge e.g. it goes up and down with rpm etc. I check actual pressure with a mechanical gauge at the engine port. Rebuilding the oil sensor harness is a good idea too.

 

[Kernal]

@ZblackliZard : If you can't do it yourself any mechanic can check the oil pressure for you. The threaded hole where you or the mechanic will attach a mechanical gauge (by removing the oil pressure sender) has 1/8 BSPT (British Standard Pipe Taper) threads, most oil pressure tools/kits should have that BSPT adapter.

Already mentioned by Malleus, here's a photo of the oil pressure sender, right forward side of block close to the exhaust manifold

 

[BTLSHP]

A word of warning, 20 months ago a mechanic put a Standard Motor products sender in ours. It started leaking badly from the crimps around the bell and the top. I replaced again this past spring with Toyota.