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If you unplug the ICP sensor on the driver side head, the PCM will assign an artificial reading to the ICP and command the IPR to build pressure without feedback from the ICP sensor.
In short... it will run. This is one of the test procedures to learn if the ICP sensor works properly.
Referring to it as an 'ICP valve' makes me wonder exactly what he is referring to. The ICP is not a valve, it is a sensor. Here is a picture that I hijacked off of someone on here that depicts much of what we deal with under the hood. Which item are you referring to?
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Slideshow: Called the Fortress, the 850-horsepower pickup combines Raptor underpinnings with military-inspired features, survival equipment, and a starting price of $285,000.
