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-   1992-1999 (https://www.gmforum.com/1992-1999-91/)
-   -   Oil Sending Unit (https://www.gmforum.com/1992-1999-91/oil-sending-unit-186539/)

strizzack 01-30-2003 02:14 PM

Oil Sending Unit
 
Where is the oil sending unit at? I need to replace it. Thanks.

willwren 01-30-2003 02:50 PM

Under the hood!

Ok, I can be a wiseass sometimes. Welcome to the forum!

Under the car, below the power steering pump and directly above the oil filter. It sticks out the 'rear' of the engine, facing the passenger side of the firewall. It has a 2-wire connector on it. Looks kinda like a big spark plug or O2 sensor.

What year and model is your car? You should put that in your signature. It'll help us to help you a ton.

strizzack 02-01-2003 03:19 PM

Thanks, I found it, but I couldn't get at it. Its so far in there, I didn't have a tool that would twist it out. I wonder how much it would cost to do at a maintnence shop.

willwren 02-01-2003 03:48 PM

Probably pretty cheap. An hours labor minimum....maybe 60 bucks labor. Check your local auto parts store. The tool to pull it may be cheaper.

Jr, haven't you done this before?

92ssei 02-01-2003 08:22 PM

ive had this prob before.. its a pretty easy fix job, as long as you have a hoist i hate creepers :)

TitZonAritZ 02-01-2003 09:06 PM

I replaced mine. Got better access by removing the passenger front wheel and reaching it through there. Got dirty, but is an easy thing to change once you get at it.

fuddyduddy121 02-01-2003 10:25 PM

I replaced it on my 93. I did the same thing. Took off the passenger front wheel and mud splash guard, and it was right there. I think I used a crescent wrench.

Bassplayincrowe 02-02-2003 01:15 PM

What problems do you get with a bad oil sender?

fuddyduddy121 02-02-2003 01:19 PM

On mine the oil gauge pressure starting reading too high.

strizzack 02-03-2003 09:08 PM

Thanks for the tips guys. I'll try removing the passenger side tire to get at it. My car has been acting really strange lately and I'm hoping that the problem is the oil sending unit. The RPM's go up and down whenever the oil pressure gauge is goes into the red zone. After awhile, my car just dies. It seems as if my car is bogging. Would you think it could be the fault of the oil sending unit?

JSeabert 02-03-2003 10:25 PM

With a bad sending unit could it read a bit low? Mine has been reading a bit low.

vze3r85p 02-03-2003 10:39 PM

What the HELL :?: :?: :?: :?: :?: :?: :?:
EASY :shock: :shock: :shock: :shock: :shock: :shock: :shock:
I needed a lift :evil: :evil: :evil: :evil: :evil: :evil: :evil:
My hand did not fit, could not turn the damn thing and lot's of crap in the way :!:
Good luck :lol:

TitZonAritZ 02-04-2003 05:20 AM

Strizzack, I don't think your problem is the sending unit. Sounds like it is reading correctly.
You have an engine problem - but you didnt mention any engine service lights going off. But still, I doubt if its the sending unit.

strizzack 02-04-2003 12:34 PM

Okay, the oil pressure guage reads fine when I first get in. The car runs beautifully until the engine warms up the normal temp. Once normal temp is hit, the oil pressure guage has now made its way down into the red zone. Once the needle hits the red zone on the oil pressure guage, the system monitor starts to beep at me, but only when I'm at a complete stop. If I'm at a stop, I can throw it into neutral and hit the gas, this brings the needle out of the red zone. At a complete stop, the car bogs and sometimes dies. Once I begin to accelerate again, the needle comes out of the red zone and drives somewhat normal, but still a little boggy. So my idea is by the time the car is at normal temp, the oil is thinner and the pressure is not there. But what is the faulty part?

willwren 02-04-2003 01:12 PM

It could still be your little friend. The PCM is seeing the oil pressure drop, also. It could be either the sender or even the oil pump.

acg_ssei 02-04-2003 01:27 PM


Originally Posted by willwren
It could still be your little friend. The PCM is seeing the oil pressure drop, also. It could be either the sender or even the oil pump.

*urp* Hopefully it's just a bad sender. (Does that feed the PCM as well, or does the PCM get its signal from a different sender?)

What weight of oil are you using? Maybe going one grade up in oil weight will help a tired oil pump; otherwise you're looking at some surgery here.

willwren 02-04-2003 01:34 PM

PCM gets the signal from the same place. It may be trying to protect the engine by killing it.


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