Ford Repair Questions? Ask a Mechanic for Answers ASAP
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Thank you for asking your question on JustAnswer. The most common cause of the problem you are having is a defective ICP (injection control pressure) sensor. However, before replacing any parts, I always recommend proper testing first. If you need, I can send the test procedures in order to determine the exact cause.
The injection control pressure (ICP) sensor is a variable capacitance sensor. A 5-volt reference voltage provided by the powertrain control module (PCM) is utilized by the sensor to produce a linear analog voltage proportional to hydraulic pressure.
The PCM monitors the ICP sensor signal to control the injection pressure regulator (IPR) duty cycle. The PCM will modulate the IPR based on the ICP signal to adjust the injector timing and injection pressure providing optimum fuel delivery at all speed, load, and temperature conditions.
If the PCM detects an out of range high or low ICP sensor, the malfunction indicator (MIL) is illuminated and the PCM will function from an estimated injection control pressure (open loop control of injection control pressure).
Thank you for asking your question on JustAnswer. The test procedures are below in pdf format, (just click on the link below).
CLICK HERE FOR TEST PROCEDURES