Does anyone know where the oil pressure switch is located on a 1995 f150 4.9 L straight six engine?

Thanks in advance....

Mike

 

I presume you mean the oil sending unit, which is what drives the oil pressure gauge on your dash?

If so, I know on my old 1985 straight-six it was a bell shaped housing, about 2-1/2in tall by maybe 4in wide (rough estimate) that screwed directly in to the side of the block, about in the middle on the non-intake/exhaust (drivers) side.

Here's some pictures from J.C. Whitney. These are just generic sensors, not necessarily Ford sensors, but they should help you get the idea.

http://www.jcwhitney.com/autoparts/P...001699/c-10101

 

All Ford trucks '87-up DO have a pressure "switch" from the factory. Not a sender. '87-96 have a resistor on the back of the instrument cluster that causes the gauge to go to mid-scale any time the pressure is over 6 psi. '97-up have no resistor - the gauge itself is built to show mid-scale when the signal terminal is shorted to ground.

Regardless of switch or sender, the 4.9L block's oil pressure port is where mrainey described: #9 below.



The captions of these pics describe how to convert from the newer switch to the older sender. For a straight 6, you don't need the plumbing - just the sender & the jumper wire.

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You might also be interested in adding a LOW FUEL light.