Compression Ignition Addict
Join Date: Oct 2011
Location: Tehachapi, CA
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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.
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!
1997 F250 SC 4x4, E4OD, 4.10 LS, Basically Stock, Relocated Block Heater Plug, External Trans Filter, Tru-Cool Max, I/C Mounted but not Plumbed
SOLD - 1994 F350 CC DRW 2WD PSD, 5 Speed, 4.10 LS, SBC Con-O, Baldwin Filter, Tymar HPX Hose, DPPI DP, Bilsteins, $12 AIC, Coolant Filter, Explorer Overhead Console, A-Pillar w/ISSPRO Black Ice, EV Boost, and EV Pyro, Modified Pedestal, Gutted EBPV.