Troubleshooting Oil Pressure and Water Temperature Gauges 

Hello, my 67 firebird oil pressure gauge reads 100 psi the needle moves just barely once shes at running temp. and I tap the throttle, my oil pressure sensor has a fitting with the tube attached to it. How do I correct this issue. Ty

I believe that his test was for the sending unit not the gauge.

But being a tapered thread it will seal its self with sufficient torque this eliminating the need for thread sealant, using it would just be a cautionary measure

Not in a v8 boat engine. Teflon is absolutely needed.!

Or remove the indicator and place on correct number during a know value.

Apply a short layer at the very top of the threads.

positive ground doesn't exist. the 2 words mean the opposite.

Thank you for your reply. I have a 1929 Dodge and a 1930 Ford. both cars are positive ground.

@@lemontier The John Deere 2 cyl.,, at least all the letter series also had positive grounds. Noted in owners and service manuals.

One second after hooking up ground to gauge wire, the gauge began to smoke after it jumped to 'Hot". I turned off the power the second I saw that. Thankfully the gauge still works. Almost ruined the gauge following this video! :(

Oregon's Lonewolf seems very strange at one point the red is positive and the next negative....

Yea, I thought wow, that would get the gauge.

They also mention oil "temperature" and "hot" when talking about an oil pressure gauge. But I would listen to the narration over the images.

Taylor Axdorff yeah, measure, then change the sensor?

@@davidjauch6682 Yes, I have changed the temp sensor and it still isn't working.

Taylor Axdorff okay. So you‘ve tested the gauge, the wiring to the sensor and the sensor which you swapped out has ground. Did you measure the replacement - maybe a dud, although unlikely? All I can come up with is verify that the sensor is grounded and make sure you have coolant in - sorry.

@@davidjauch6682 Ok I'll double check the sensor to make sure it's not a dud. Thank you. I do have another issue - my oil pressure gauge maxes out everytime I start the engine? Though the oil pressure is not actually high as we had the engine tested prior to putting it in.

@@taylorandtyler11 old comment but. make sure it's the right temp sensor. if it's a sensor of too high resistance then it will only read cold.

Okay what year make model engine do you have in the Cutlass

@@michaelb.7800 1985 442 5.0 307

@@cloudrhezii If you would be willing to I can walk you through exactly what you need to do to test and Rule out each segment I'm going to go out on a limb and say that you have a multimeter does your multimeter have piercing capabilities and if so what you need to do without shredding your wire check for your reference wire your ground once it is unplugged from the temperature sending unit once you've done that if that comes back clear and your reference check and wiring comes back good let me know we'll go from there I can always give you my number privately and it would make it easier for me to send you pictures and diagrams and the actual and oem schematics that you need for your vehicle

So do I put one end on wire and one to ground from multimeter?..thks..jc

Thanks for the response. I have no idea where the end of wire goes to.....jc

Check the intake manfold!

@@stanbarrington9698 thanks I will check there we believe the engine was changed out to a 350 ,. I will post a video of it tomorrow and see you or someone can help me with it thanks

@@DH-fc2os there is a port on SBC intake manifolds for sender mounting

@@stanbarrington9698 thanks

Same with mine. I think he’s saying there is a break in the wire, causing the circuit to ground which makes the high reading.

you'd be supprised. seeing as it was PERFECTLY FUCKING NORMAL back in the day. these days though everything is made in such a way that it would break if you did. and everyone is forced to pay 20x as much as you should for a mix that's litterally 80% or more water and some chemicals. and then there is the stupidity of people. people that fill the coolant resovoir up with pure antifreeze.

@@estaworks-3d102 People still refer to digital video recording as "filming". Some anachronisms are annoying.

Oh yes I do .in my boats in the river or lakes. Raw water cooled!!