Oil Pressure Gage
Thread Starter
Senior Member
Joined: Oct 2017
Posts: 491
Likes: 36
From: Bridger, Montana
Oil Pressure Gage
So the sending unit for the oil pressure gauge is actually a switch with a resistor. I'm wondering if anyone has replaced the sending unit with a real one? Any reason it won't work?
Senior Member
Joined: Apr 2015
Posts: 1,794
Likes: 269
From: MS Gulf Coast
I think I recall a thread a few years back where somebody removed the resistor in the instrument cluster saying it would make you gauge become functional. I don’t really see how it would work with the current pressure switch. The other issue I see is with no numbers on the gauge, how do you determine if you’re getting sufficient oil press?
LightningRod
Joined: Jan 2014
Posts: 2,412
Likes: 651
From: San Antonio Texas
I think I recall a thread a few years back where somebody removed the resistor in the instrument cluster saying it would make you gauge become functional. I don’t really see how it would work with the current pressure switch. The other issue I see is with no numbers on the gauge, how do you determine if you’re getting sufficient oil press?
According to the factory wiring service manual the OP switch wires directly to the instrument cluster, which has a microprocessor that manages the gauges and CAN bus communications with the PCM. As long as the IC tells the PCM the switch is closed, the PCM figures (oil pressure being directly proportional to RPM) every is all ok.
But I am a fan of 'knowing exactly what my oil pressure really is'.
EDIT: BTW, so as to not be confusing or misleading, this ^^^^^ was cold start on a hot S. Texas day. Full operating temperature, in Drive, A/C on, idle will be ~ 20 - 22.
Last edited by F150Torqued; Feb 1, 2018 at 10:05 AM.