I just bought a 302 with 145,000 miles (1994 F150 SuperCab LongBed). After changing the oil to 10-W30 the oil pressure sits between the 'N' and the 'O' in 'NORMAL'. I guess I'm just curious as to how common that is. I do understand that sending unit (pressure transducer) can vary as well.

 

The oil pressure guage is basically an idiot light. They use a pressure switch instead of a pressure sending unit and the switch is either on or off. When on, it gives you mid guage reading when off, you have less than 7# oil pressure.

 

Very interesting. I can believe that because it doesn't move with RPMs. My 1999 s10 would flucuate 10-15 lbs between idle and 2500 RPM.

Thanks! That means I don't have any issues.

Now to figure out how to fit a pressure transducer in that hole and make the needle work like it should.

I don't know about you but that kind of ticks me off that Ford would do that. If it is not actually a gauge, DON'T MAKE IT LOOK LIKE ONE.

 

I'm in the middle of converting this right now. Go back to 06-18-2010 Oil sender/switch conversion thread and see Subfords response. I'm doing the 45 degree adaptor / sending unit change from 1987 302 sending unit. You then have to jumper out the 20 ohm resistor across the oil pressure guage. You then get a working guage.

 

That's exactly what I did on my '89.

 

Thanks, that sounds pretty simple.

 

I finished mine today. The 45 degree adapter didn't bring the sender out far enough so I got two M/F adapters screwed together and it brought it out another 1 1/2 inches. I have it pointing toward the front and it clears everything. I now have a working gauge.

 

i was going to do it on my 95 f250. but getting in there on my 351 is a pain. even trying to get the oil filter off is tight.