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Oil sending unit?

Tiny
BRYANPITTMAN
  • MEMBER
  • 4 POSTS
Well the only other sensor is for an s10 that has a z or w in like the 7th spot of the vin number of the truck and my vin number doesnt have a z or w in it at all.
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Wednesday, August 28th, 2019 AT 9:35 PM (Merged)
Tiny
DEWAYNE GRUBAUGH
  • MEMBER
  • 1 POST
  • 1993 CHEVROLET S-10
Electrical problem
1993 Chevy S-10 6 cyl Four Wheel Drive Automatic 112k miles

fuel pump quit, or so I thought. Aftter replacing fuel pump and before reinstalling gas tank, I applied 12 volts to pump and heard it run. Then I checked again after I plugged the electrical connection together under the truck and turned on the ign but pump did not run. I unplugged connection and I do not have 12vdc at the plug. Fuse is good. I believe the fuse is labeled ECMB. I looked at a wiring diagram in a repair manuel and it said to check the fuel pump relay and the oil pressure switch. I cannot find either. Where are they located and what do they look like? Are we talking about the oil pressure sending unit that works the oil pressure gauge or lite:
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Wednesday, August 28th, 2019 AT 9:35 PM (Merged)
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
All you got is 2secs to look for power at the gray wire anything over 2 sec you ain't gonna have it the fuel pump relay de-energizes which is controlled by the computer-When the engine fires up the oil pressure sending unit powers the pump see below-


https://www.2carpros.com/forum/automotive_pictures/12900_oil_sending_unit_and_fuel_pump_circuit_34.gif

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Wednesday, August 28th, 2019 AT 9:35 PM (Merged)
Tiny
WRENCHTECH
  • MECHANIC
  • 20,761 POSTS
That would be because both of those choices are for the 4.3 engine options and you have the 2.8
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Wednesday, August 28th, 2019 AT 9:35 PM (Merged)
Tiny
BRYANPITTMAN
  • MEMBER
  • 4 POSTS
Well then there is only one sensor for my truck and thats the one I got.
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Wednesday, August 28th, 2019 AT 9:35 PM (Merged)
Tiny
AALAMO17
  • MEMBER
  • 4 POSTS
What would happen if after 10 minutes of being on one turned it off and the fuel pump remains activated.
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Wednesday, August 28th, 2019 AT 9:35 PM (Merged)
Tiny
WRENCHTECH
  • MECHANIC
  • 20,761 POSTS
If unplugging it sender stops the fuel pump, then the sender is the problem.
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Wednesday, August 28th, 2019 AT 9:35 PM (Merged)
Tiny
DANNY L
  • MECHANIC
  • 5,648 POSTS
Hello, I'm Danny.

Unfortunately, you've attached a response to a years old question.You need to start a new question with the symptoms and your vehicle . Here's the link:

https://www.2carpros.com/questions/newinformation.

Thanks for using 2CarPros.
Danny-
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Wednesday, August 28th, 2019 AT 9:35 PM (Merged)
Tiny
SISKO89
  • MEMBER
  • 6 POSTS
  • 1992 CHEVROLET S-10
  • 6 CYL
  • 2WD
  • MANUAL
  • 141,000 MILES
The oil pressure gage keeps jumping while engine is idleing. Gage smooths out when rpms increase.

Do I need to change the oil pressure sending unit.
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Wednesday, August 28th, 2019 AT 9:35 PM (Merged)
Tiny
MHPAUTOS
  • MECHANIC
  • 31,937 POSTS
Hi there,

Just to be on the safe side, have the engine oil pressure tested with a master gauge, this will give a true indication as to the oil pressure. If all OK change the sender.

Mark (mhpautos)
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Wednesday, August 28th, 2019 AT 9:35 PM (Merged)
Tiny
MATT4401
  • MEMBER
  • 12 POSTS
  • 1991 CHEVROLET S-10
Electrical problem
1991 Chevy S-10 4 cyl Two Wheel Drive Manual

Where is the water temp sensor and the oil pressure sensor located on the engine? The engine is a 2.5L 4 cylinder in a 91 chevy s10.
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Wednesday, August 28th, 2019 AT 9:35 PM (Merged)
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
2.5L VIN E oil pressure switch located at oil filter flange

2.5L Coolant Temperature Sensor On thermostat housing
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Wednesday, August 28th, 2019 AT 9:35 PM (Merged)
Tiny
MATT4401
  • MEMBER
  • 12 POSTS
Ok cool, I see the coolant temp sensor, but not the oil pressure switch. There is a sensor on the back of the head with one green wire coming out of it. What is that sensor for?
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Wednesday, August 28th, 2019 AT 9:35 PM (Merged)
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Oil pressure switch is at the oi filter flange
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Wednesday, August 28th, 2019 AT 9:35 PM (Merged)
Tiny
MATT4401
  • MEMBER
  • 12 POSTS
Does it have 2 tan wires and an orange wire coming out of it?
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Wednesday, August 28th, 2019 AT 9:35 PM (Merged)
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
This wires is it coming out of a connector threaded in the engine on the flange of the oil filter-the colors I got is gray and orange.

Is this a blazer or truck?
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Wednesday, August 28th, 2019 AT 9:35 PM (Merged)
Tiny
RERAIL
  • MEMBER
  • 1 POST
  • 1988 CHEVROLET S-10
Electrical problem
1988 Chevy S-10 6 cyl 102869 miles

can someone tell me where the oil sending unit is located on my 88 S-10 4X4 pickup with a 2.8 engine?
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Wednesday, August 28th, 2019 AT 9:35 PM (Merged)
Tiny
MATT4401
  • MEMBER
  • 12 POSTS
It`s a 2 wheel drive truck
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Wednesday, August 28th, 2019 AT 9:35 PM (Merged)
Tiny
BLUELIGHTNIN6
  • MECHANIC
  • 16,542 POSTS
The oil pressure sending unit/switch is located at the oil filter flange for the 2.8L engines.

Thanks for using 2CarPros. Com!
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Wednesday, August 28th, 2019 AT 9:35 PM (Merged)

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