oil pressure sending unit
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Joined: Sep 2004
Posts: 87
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From: Huntsville Texas
oil pressure sending unit
There are two seperate sending units at the back of the intake manifold on my '86 coupe. One is a cannister with a single prong electrical connection and the second is a smaller sending unit with two prongs. Which is the sending unit for the oil pressure guage? I'm down right now doing an engine swap, so I can't just fire it up and check.
Instructor
Joined: Jul 2005
Posts: 133
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From: hartwell ga
The switch
tells the computer to activate the ignition when enough oil pressure is detected. The are prone to leaking through the ecectrical part of the unit and they will pour oil through the wire connections. To install the unit properly, you will have to get a special socket. THis is a must have part and it needs to function properly. Let us know how the motor swap goes.
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Team Owner
Joined: Mar 2000
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From: Boston, MA
More infomation on the switch.
The switch monitors the oil pressure in the engine. As long as there is sufficient oil pressure it supplies a power feed to your fuel pump that is independent of the fuel pump relay. If your fuel pump relay were to die while driving down the road, this switch would keep you running.
If you ever turn your key to 'on' and do not hear the fuel pump prime, but you CAN start the car with some extended cranking (buildng oil pressure) then it is a good idea to test your FP relay.
The switch monitors the oil pressure in the engine. As long as there is sufficient oil pressure it supplies a power feed to your fuel pump that is independent of the fuel pump relay. If your fuel pump relay were to die while driving down the road, this switch would keep you running.
If you ever turn your key to 'on' and do not hear the fuel pump prime, but you CAN start the car with some extended cranking (buildng oil pressure) then it is a good idea to test your FP relay.
Team Owner
Joined: Sep 2001
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From: Athens AL
C7 of the Year - Unmodified Finalist 2021
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One other thing, its not a safety switch, if your pressure drops to zero, it will not send a kill signal to the ignition.
Team Owner
Joined: Mar 2000
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From: Boston, MA
Originally Posted by vader86
One other thing, its not a safety switch, if your pressure drops to zero, it will not send a kill signal to the ignition.
Team Owner
Joined: Sep 2001
Posts: 62,161
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From: Athens AL
C7 of the Year - Unmodified Finalist 2021
C4 of Year Finalist (performance mods) 2019
Originally Posted by scorp508
the fuel pump relay will still be powering it.
Race Director
Joined: Sep 2000
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From: The Top of Utah
Originally Posted by vader86
making it pretty much useless, it would be nice if it killed power to both
RACE ON!!!
Team Owner
Joined: Mar 2000
Posts: 83,383
Likes: 87
From: Boston, MA
Originally Posted by vader86
making it pretty much useless, it would be nice if it killed power to both
Team Owner
Joined: Sep 2001
Posts: 62,161
Likes: 1,733
From: Athens AL
C7 of the Year - Unmodified Finalist 2021
C4 of Year Finalist (performance mods) 2019
Originally Posted by scorp508
Well... I for one wouldn't want my engine qutting and my rear end locking up at 80 MPH.
