Report all of your findings on your blog by the 11th (Sunday night) deadline.

This is all on the college black Dodge 4WD truck:

1. #2 below shows the FCA. What is it and what does it do?

It is a fuel control acuator.It controls fuel pressure in fuel rail"The Fuel Control Actuator (FCA) is an electronically controlled solenoid valve. The ECM controls the amount of fuel that enters the high-pressure pumping chambers by opening and closing the FCA based on a demanded fuel pressure."

2. Copy and paste the HP fuel “Warning” text from Alldata AND/or Cummins into your

blog. What is the pressure to be cautious of, in psi?Verify high pressure pump output volume (see high pressure pump info). You can also cap off all the injectors and see how quickly the rail pressure climbs. It takes about 4000 PSI rail pressure in order to start

3. Regarding the intake manifold air heater element: How many elements are on the

truck? How much current is needed to the operate the unit?
Two heavy-duty cables connect the 2 air heater elements to the 2 air heater relays. Each
of these cables will supply approximately 95 amps at 12 volts to an individual heating element
within the heater block assembly.

4. This unit is currently in a “cranks but no start” condition. What codes are present?

DTC P0148; high pressure common rail checksum, which is a deviation between the fuel pressure set point and the actual fuel pressure.

1. FCA, check for rust on the fuel control actuator, which could indicate other fuel system problems caused by water contamination.
2. Fuel pressure sensor
3. Lift pump or fuel supply issues, check fuel supply pressure and fuel filter condition.
4. Cascade over flow valve
5. Pressure limit valve
6. Injectors, excessive return, see injectors
7. High pressure pump (CP3)

DTC P0300 – P0306; injector misfire, all and 1 through 6

1. Low fuel supply pressure
2. Use scan tool to isolate each cylinder

DTC P0217; decreased engine performance due to a engine overheat condition

1. Check ECT sensor
2. Restricted air flow (caked dirt and bugs) through the intercooler and radiator.

DTC P0251; CP3 pump regulator control, ECM detects a discrepancy between PWM signal supplied to FCA and the PWM returned from FCA

1. Low or no fuel supply pressure (bad supply pump or plugged filter)
2. Fuel Control Actuator (FCA) bad, use the scan tool to verify rail pressure set point versus fuel pressure. Normal idle pressure is 6000 – 7000 PSI. If you have a fluctuation over 500 PSI this can cause a surge as well.

DTC P0336; crank position sensor (CKP) signal, CLP below calibrated value

1. Excessive cranking with a no start condition
2. CKP sensor
3. CKP wiring issue

No Start or Hard Start

1. No or low fuel supply to the high pressure pump (CP3)
2. Monitor rail pressure and see if you have over 4000 PSI during cranking, if not one or more injectors can cause a hard start, see injector section for further diagnostics. No smoke from the tailpipe after about 10 seconds of cranking means no fuel is getting into the cylinders.
3. Injector connector tube not seated in injector, bad tube or improper torque on nut.
4. Leaking fuel pressure limit valve, should not leak at idle or during cranking.
5. Verify high pressure pump output volume (see high pressure pump info). You can also cap off all the injectors and see how quickly the rail pressure climbs. It takes about 4000 PSI rail pressure in order to start.
6. Shorted fan clutch, unplug fan and try starting again.

Does this relate to the no start? (DO NOT REPAIR THE PROBLEM. DO NOT TELL

ANYONE OF YOUR FINDINGS)

5. With the Modis scan tool. Make the horn blow and wipers operate. What is this type

of control called?