From NAPA online:

Part Number: ECH OP6675
Product Line: Echlin Ignition Parts
Attributes:
# Switch Terminals : 3
Oil Pressure Switch Pressure Rating : 60 psi , Terminals #1,3 Closes at 1.5-7.5 psi(What?)
Oil Pressure Switch Thread Size : 1/4" x 18" NPT

Features and Benefits:
Gauge Type, Also Used as Fuel Pump Pressure Switch(again, what?)
NAPA Echlin Products Meet Or Exceed Original Equipment Specifications. All Products Are Top-Of-The-Line Quality, & 100% Tested & Inspected In An Environment That Is IS09000 Compliant.

Here is the other, cheaper one:

Part Number: MPE OP6675SB
Product Line: Mileage Plus Electrical
Attributes:
Oil Pressure Switch Pressure Rating : 60 psi
Oil Pressure Switch Thread Size : 1/4" x 18 NPTF
Features and Benefits:
Mileage Plus Value Priced Products Meet Original Equipment Quality & Performance
They Are Designed To Be A Cost Effective Replacement Part For The Vehicle.


Is it okay to use either one?

 

youve got two, first one is a single blade switch that is for the gauge, the second is a 2 blade switch for the fuel pump

 

For my car, I need the one on the driver side right by the coolant temp sensor...I'm not sure which I need.

 

how many prongs are on it?

 

TPI?
coolant temp sensor on drivers side is for dash gauge with a single blade terminal
lower sensor near oil filer is oil pressure cut off for fuel pump

the coolant temp sensor on passenger side is for fans
thing lower on block is the spark knock sensor they both use same plug style

sensor near distributor is for oil pressure gauge

there is a third sensor under plenum and a forth in front of intake
good luck
advance auto has most of them use code p20 for 20% off

 

This, this is the one I'm talking about. It leaks oil and the gauge is jumpy, so I figured I'd replace it.

vvvv So this is the one I need, right? vvvv


Part Number: ECH OP6675
Product Line: Echlin Ignition Parts
Attributes:
# Switch Terminals : 3
Oil Pressure Switch Pressure Rating : 60 psi , Terminals #1,3 Closes at 1.5-7.5 psi(What?)
Oil Pressure Switch Thread Size : 1/4" x 18" NPT

Features and Benefits:
Gauge Type, Also Used as Fuel Pump Pressure Switch
NAPA Echlin Products Meet Or Exceed Original Equipment Specifications. All Products Are Top-Of-The-Line Quality, & 100% Tested & Inspected In An Environment That Is IS09000 Compliant.

 

http://www.autozone.com/autozone/par...13_0_9889_5835

 

The 90 uses a single oil pressure sender and fuel pump cutoff switch combination. Thus the 3 terminals. It should be located below the distributor. Atleast every GM V8 I've ever worked on(and that's a whole bunch) had it located there. A possible alternate location would be just above the oil filter, in the block.

The difference between the two NAPA switches is one is top quality( I understand the NAPA electrical parts are now made by Standard Motor Products which is a good manufacturer). The Echlin is Standard red box which is their best quality, the Mileage Plus is Standard green box, or Tru-tech which is the value brand. I've used both without any problems. Of course all of these electrical parts, even Bosch and AC Delco are now made in China, which really burns my butt.

 

Thanks for the input, I'll be picking the switch up tomorrow.

And my switch is located right above my oil filter...driver side, below my coolant temp sensor. I've replaced my dist. before and don't remember seeing an oil pressure switch there.

 

FYI - there is no coolant temp sensor on the driver side anywhere close to the oil filter, so I'm not sure what you are seeeing (maybe the O2 sensor on the exhaust?).

Coolant temp sensors are 1) driver side head between #1 and #3 spark plugs (guage), and 2) on intake beside the thermostat housing (for the computer/fans).

Also note - the oil pressure switch (neither/none of them) have anything to do with fuel cut off, as they will not cut the fuel off. The one by the oil filter actually turns on the fuel pump in the event that the ECM and/or fuel pump relay stop working, so that you can still get fuel to limp home on.

 

That's the one. I mean it's not RIGHT next to it but when I'm looking at my oil press. switch, I can see that too.

 

I'm going to change this during the weekend while doing an oil change.

If for some reason this one doesn't work and I need to put the old on back in, do I need to drain the oil to replace the switch?

 

No.

 

so im needing to change this switch as well. i have a 92 bird with the stock 305. my switch is the 3 prong and is located above to oil filter. my question is how do you get the old one off? i tried using pliers to grab it and there isnt much room to work with there ( i had the oil filter off ). i dont know if there is a special tool to get it off there or not. any input would be very nice!! thx in advance..btw here is the part i got.

http://www.oreillyauto.com/site/c/de...3438&ppt=C0039

 

I'm going to try using a crows foot to get it. I just blew a head gasket on so this thing kinda took a backseat : (