Unplug it. Simple

 

^^^^^ Then the PCM will always think the engine is stone cold. Don't think that's a good idea.

 

Huh no it won't mine is unplugged and gutted it won't effect anything just don't start it up ice cold and beat the bag out of it I diss connect them and hook them up for customers on toggle for exhauste brake

 

Uhhhmm, that's the EBPV. The OP is posting about the EOT sensor.

 

I infer stand he is saying the Ebpv is staying quarter open and etc

 

The Engine Oil Temperature (EOT) sensor is located on the backside of the High Pressure Oil Pump (HPOP) Reservoir. Here's some basic info on it:

The engine oil temperature (EOT) sensor is a thermistor type sensor that has a variable resistance that changes when exposed to different temperatures. When interfaced with the powertrain control module (PCM), it produces a 0 to 5 volt analog signal that will deduce temperature.

Cranking Fuel Quantity/Timing Control -- The EOT sensor signal is used to determine the timing and quantity of fuel required to optimize starting over all temperature conditions.

Idle Speed -- At oil temperatures below 70°C (158°F) low idle is incrementally increased to a maximum of 950 rpm.

Temperature Compensation -- Fuel quantity and timing is controlled throughout the total operating range to ensure adequate torque and power is available.

Glow Plug Control -- The glow plug relay and lamp ON time are controlled by engine oil temperature.

Detection/Management

An EOT sensor signal that is detected out of range (high or low) by the PCM will cause the PCM to ignore the EOT sensor signal and assume an engine oil temperature of -34°C (-29°F) for starting and a temperature of 100°C (212°F) for engine-running conditions. The CHECK ENGINE light will also be illuminated as long as the condition exists.

I would get it from Ford or International (I actually don't have the part number handy for it). Cheers!

 

The EBPV is evidently doing exactly what it's supposed to be doing. But it's doing it based on bad information from the EOT. Yeah, there is a purpose to disconnecting or gutting the EBPV, but the EOT will still be wrong, and as the OP said, will still be adversely affecting how the engine runs.

As for the EOT, it's on the back of the HPO reservoir; two wires, green/red and gray/red.

Edit (post leap-frogged with the previous): This is interesting:

Cranking Fuel Quantity/Timing Control -- The EOT sensor signal is used to determine the timing and quantity of fuel required to optimize starting over all temperature conditions.

There've been a lot of posts on the various forums lately about hard cold starting, even after confirming a good glow plug system, etc. Gotta wonder if this isn't a factor.

 

An update:

I found a few aftermarket sensors and found them all to have ~30k ohm values at room temp, dropping as the bic lighter flame was held near the tip. I pulled mine, and it unfortunately is doing exactly what the new sensors are doing... so it would appear my EOT is good. The Ford PN on my sensor is F5AF-12A648-AA 7H26C.

What I'm confused on is why the resistance drops as temp increases, and the ECM reported voltage drops as temp increases. I would think the two would have an inverse relationship. Now I have to figure out why mine is stuck at 2v and 140F.

 

There are 2 common types of thermistors. PTC (positive temperature coefficient): resistance goes up as temperature goes up.
NTC (negative temperature co-efficient) resistance goes down as temperature goes up
I can't recall, did you ohm out your existing sensor at room temp?
If you unplug the sensor, and take a drive will the EBPV stay closed all the time?

 

If it is in default how does long does it stay it cold start before it switches to engine running?

 

Digging up an old thread. My 99 is doing the same things. Good info here but did the EOT fix the problem

 

also digging up and old thread.
97 f450 cant do a cct because of p0195. sensor ohms at 32k room temp. resistance goes down as temp goes up.(testing with ford part and aftermarket part same results) I am also getting 5.99 volts instead of 5 volts to sensor with koeo using dvom. the ground to sensor checks out good.
I left block heater on all day and eot was 232 on scanner. unplugged block heater and 1 hr later eot was up to 247??? that's backwards. I am going to check eot on scanner this evening after truck has set all day to see what is says. I have also read somewhere that the cct couldn't be completed not only for low eot's but high eot's also.
can anyone share some info to further diagnose or have any ideas?
m suspecting ecm but would like to further diagnose.
thanks

 

After sitting all day eot is 280??? Colder it gets higher eot is???

 

I'd say it's either a bad EOT, or the wrong one, or something switched up in the wiring between the EOT connector and the PCM.

 

So according to ford's service manual, this EOT sensor is an NTC resistor.
As the sensor's temperature increases, the resistance should decrease. Unfortunately it doesn't list reference points at temperature to provide a baseline.
Are you measuring that 5.99V across the sensor leads, or from hot to body ground?
Aside from that, I would have to agree that the PCM is failing.

 

I get 5.99 from hot to body ground.