just finished putting a new napa filter on my 97 7.3. sounds good when your foot is in it. what is the sensor, or switch that is in the old box, and what should be done with it?
thanks for the help and the pics and the filter number, sure made this simple
Randy

 

That is the air temp sensor. Most people just cable tie it to the fender well.

 

Ditto.
Just tie it off in the vicinity.
Follow up question: I am thinking this is the sensor that the EBPV uses to decide when it is warm enough to disengage?
That, I think is my next minor mod. Switching the EBPV so I can turn it off on my way to work to avoid the annoying noise and turn it on anytime I want to make the annoying noise ala Jake Brake when going downhill with the trailer.

 

ckal704, I'm not 100% sure, but I think the PCM uses input from the oil temp sensor and water temp sensor to shut down the EBPV. Hopefully someone that knows for sure can answer this.

 

Both The EOT(engine oil temp) and AAT (ambient air temperature) are used to control the EBPV. When I installed a kwik filter (6637) I just tied off the AAT near the filter.

From the factory service manual:

Exhaust Back Pressure System
The exhaust back pressure system causes rapid engine warm-up to provide warm coolant for the heater and defroster system.

EPR
The exhaust back pressure regulator (EPR) output from the PCM controls the EPR when the engine is running and engine oil temperature is below 75° C (167°F) and ambient air temperature is below 7°C (45°F). The EPR operates a butterfly valve which controls exhaust back pressure. The back pressure will be controlled during low-load, low-speed conditions. At high-load, high-speed conditions, the back pressure system is disabled. The valve is cycled on/off for every start-up to help prevent sticking of the butterfly valve.

EBP Sensor
The exhaust back pressure (EBP) sensor measures the pressure in the exhaust system downstream of the turbo outlet and upstream of the exhaust back pressure butterfly valve. This sensor is used in conjunction with the EPR to form a closed loop exhaust back pressure control system. The exhaust back pressure is controlled to make the engine run hotter and thus provide more heat to the coolant for cab heating in cold climates during cold engine operation. Additionally, the EBP sensor is used to diagnose excessive back pressure, for restricted exhaust system concerns.

Engine oil pressure is used to control the butterfly valve position via the closed loop control.

 

thats what that jake brake noise is. the truck is in a 40 degree garage and when i am outside for a while, about 0 degrees outside, i get the brake noise going down hill. so is there a good place to tie up the sensor?

thanks for all the help!!!!!!!!!!!!
Randy