My truck isn't showing any oil pressure on the dash guage. Any Idea what could be causing this? I was thinking of changing the EOP Switch... I assume it is electrical since it flickered on/off a bit.

 

The first thing I would do is part a mechanical gauge on the engine and check oil pressure. Use a multimeter and test the sending unit (really a switch on this engine). It turns on and off, it doesn't vary current on pressure, it just switches on a minimum psi. If the sending unit it good, then your issue may be with the switch/panel. It could also be some chaffed wiring. There are a lot of items to troubleshoot on this one. You know you have some type of oil pressure, the engine won't run without it.

 

The oil pressure "gauge" only takes 7 1/2 psi to register normal. Give the plug-in a wiggle to see if it's a bad connection and then follow all of D's recommendations. I know of a few of these sending units that have failed, but take no chances. As he said, it won't run without oil pressure at the sending unit point---it's impossible.

 

I jiggled the connector and now it's back... must be a bad connection

 

Does anyone know the part number for this oil pressure switch?

 

I found the part number of the oil pressure switch if anyone needs it...

Ford: F81Z9278AA
Motorcraft: SW5267
International: 1831259C91

 

There are two listings in my parts list (SW ASY-OIL PRESS SDR):

Ford Service #...Ford Part #......International #
<TABLE style="WIDTH: 244pt; BORDER-COLLAPSE: collapse" border=0 cellSpacing=0 cellPadding=0 width=325 x:str><COLGROUP><COL style="WIDTH: 84pt; mso-width-source: userset; mso-width-alt: 4096" width=112><COL style="WIDTH: 82pt; mso-width-source: userset; mso-width-alt: 3986" width=109><COL style="WIDTH: 78pt; mso-width-source: userset; mso-width-alt: 3803" width=104><TBODY><TR style="HEIGHT: 11.25pt" height=15><TD style="BORDER-BOTTOM: #ece9d8; BORDER-LEFT: #ece9d8; BACKGROUND-COLOR: transparent; WIDTH: 84pt; HEIGHT: 11.25pt; BORDER-TOP: #ece9d8; BORDER-RIGHT: #ece9d8" class=xl25 height=15 width=112>F81Z-9278-AA</TD><TD style="BORDER-BOTTOM: #ece9d8; BORDER-LEFT: #ece9d8; BACKGROUND-COLOR: transparent; WIDTH: 82pt; BORDER-TOP: #ece9d8; BORDER-RIGHT: #ece9d8" class=xl25 width=109>3C34-9278-AA</TD><TD style="BORDER-BOTTOM: #ece9d8; BORDER-LEFT: #ece9d8; BACKGROUND-COLOR: transparent; WIDTH: 78pt; BORDER-TOP: #ece9d8; BORDER-RIGHT: #ece9d8" class=xl25 width=104>1831259C91</TD></TR><TR style="HEIGHT: 11.25pt" height=15><TD style="BORDER-BOTTOM: #ece9d8; BORDER-LEFT: #ece9d8; BACKGROUND-COLOR: transparent; HEIGHT: 11.25pt; BORDER-TOP: #ece9d8; BORDER-RIGHT: #ece9d8" class=xl25 height=15>5C4Z-9278-A</TD><TD style="BORDER-BOTTOM: #ece9d8; BORDER-LEFT: #ece9d8; BACKGROUND-COLOR: transparent; BORDER-TOP: #ece9d8; BORDER-RIGHT: #ece9d8" class=xl25>5C4O-9278-AA</TD><TD style="BORDER-BOTTOM: #ece9d8; BORDER-LEFT: #ece9d8; BACKGROUND-COLOR: transparent; BORDER-TOP: #ece9d8; BORDER-RIGHT: #ece9d8" class=xl25>2039609C1</TD></TR></TBODY></TABLE>

Not sure of the difference - probably model year dependent.

 

IIRC you have the ford part# and ford service# switched on your chart.....any decent ford parts guy can figure it out though. Last 8 of your VIN is priceless.