Just got my truck back from the shop and I checked the codes...these two came up. Any ideas??? It got two new injectors and is still pumping fuel into the crankcase. Turbo boost limit exceeded is the first, but what does that mean? And I guess the second means I need a new pump...?? What do you guys think???

 

First one is common w/ an aftermarket turbo. Got any gauges?
Second one, thought it might be an FCA, but the manual doesn't mention replacement. Possible causes:

FUEL PUMP
(K181) FUEL CONTROL ACTUATOR DRIVER OPEN
(K31) RETURN CIRCUIT OPEN FROM FCA TO ECM
(K181) FUEL CONTROL ACTUATOR DRIVER CIRCUIT SHORTED TO EXTERNAL VOLTAGE
(K31) FUEL CONTROL ACTUATOR RETURN CIRCUIT SHORTED TO EXTERNAL VOLTAGE
(K31) FCA RETURN CIRCUIT SHORTED TO (K181) FCA DRIVER CIRCUIT
(K181) FUEL CONTROL ACTUATOR DRIVER CIRCUIT SHORTED TO GROUND
(K181) FUEL CONTROL ACTUATOR DRIVER CIRCUIT SHORTED TO ANOTHER CIRCUIT
(K31) FUEL CONTROL ACTUATOR RETURN CIRCUIT SHORTED TO ANOTHER CIRCUIT
INTERMITTENT CONDITION
ECM

 

1. FUEL PUMP
Ignition on, engine not running.
Disconnect the Fuel Control Actuator (FCA) harness connector.
Connect an incandescent test light across the Fuel Control Actuator
driver circuit and the Fuel Control Actuator return circuit at the fuel control
actuator harness connector.
Observe the test light.
The ECM will perform a self test of the circuit which should momentarily
flash the test light brightly, one time, approximately 20 seconds after
being connected.
NOTE: Check connectors - Clean/repair as necessary.
NOTE: Compare test light brightness to that of a direct connection
to the battery.
Did the light flash brightly?
Yes >> Replace the Fuel Pump.
Perform POWERTRAIN VERIFICATION TEST VER - 1
(DIESEL). (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL
MODULES/ENGINE CONTROL MODULE - DIAGNOSIS
AND TESTING)
No >> Go To 2

To check and see if it's the fuel pump, unplug the connector on the FCA. Use a test light, and probe #1 terminal, be the on on the left with the release tab pointing up and the clip on the other.

 

2. (K181) FUEL CONTROL ACTUATOR DRIVER OPEN
Turn the ignition off.
Disconnect the ECM harness connectors.
NOTE: Check connectors - Clean/repair as necessary.
Measure the resistance of the FCA driver circuit between the electronic
fuel control actuator harness connector and the ECM harness connector.
Is the resistance less than 10 Ohms?
Yes >> Go To 3
No >> Repair the (K181) Fuel Control Actuator Driver circuit
OPEN.
Perform POWERTRAIN VERIFICATION TEST VER - 1
(DIESEL). (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL
MODULES/ENGINE CONTROL MODULE - DIAGNOSIS
AND TESTING)


3. (K31) RETURN CIRCUIT OPEN
Measure the resistance of the (K31) return circuit between the FCA harness
connector and the ECM harness connector.
Is the resistance less than 10 Ohms?
Yes >> Go To 4
No >> Repair or replace the engine wiring harness.
Perform POWERTRAIN VERIFICATION TEST VER - 1
(DIESEL). (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL
MODULES/ENGINE CONTROL MODULE - DIAGNOSIS
AND TESTING)


4. (K181) FUEL CONTROL ACTUATOR DRIVER CIRCUIT SHORTED TO EXTERNAL VOLTAGE
Measure the voltage between the (K181) FCA driver circuit in the FCA
harness connector and battery negative.
Is the voltage greater than 1 volts?
Yes >> Repair the (K181) FCA driver circuit shorted to external voltage.
No >> Go To 5


5. (K31) FUEL CONTROL ACTUATOR RETURN CIRCUIT SHORTED TO EXTERNAL VOLTAGE
Measure the voltage between the (K31) FCA return circuit in the FCA
harness connector and battery negative.
Is the voltage greater than 1 volts?
Yes >> Repair the (K31) FCA return circuit shorted to external voltage.
Perform POWERTRAIN VERIFICATION TEST VER - 1
(DIESEL). (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL
MODULES/ENGINE CONTROL MODULE - DIAGNOSIS
AND TESTING)
No >> Go To 6

 

6. (K31) FCA RETURN CIRCUIT SHORTED TO (K181) FCA DRIVER CIRCUIT
Measure the Resistance between the return circuit in the FCA harness
connector and Driver circuit.
Is the resistance less than 10 Ohms?
Yes >> Repair the (K31) FCA Return circuit shorted to (K181) FCA
Driver circuit.
Perform POWERTRAIN VERIFICATION TEST VER - 1
(DIESEL). (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL
MODULES/ENGINE CONTROL MODULE - DIAGNOSIS
AND TESTING)
No >> Go To 7


7. (K181) FUEL CONTROL ACTUATOR DRIVER CIRCUIT SHORTED TO GROUND
Measure the resistance between the (K181) FCA driver circuit in the
FCA harness connector and battery negative.
Is the resistance less than 10 Ohms?
Yes >> Repair the (K181) FCA driver circuit shorted to ground.
Perform POWERTRAIN VERIFICATION TEST VER - 1
(DIESEL). (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL
MODULES/ENGINE CONTROL MODULE - DIAGNOSIS
AND TESTING)
No >> Go To 8


8. (K181) FUEL CONTROL ACTUATOR DRIVER CIRCUIT SHORTED TO ANOTHER CIRCUIT
Measure the resistance between the (K181) FCA driver circuit in the
ECM harness connector and all other circuits in the ECM connectors.
Is the resistance less than 10 Ohms?
No >> Go To 9
Yes >> Repair the (K181) FCA driver circuit shorted to another circuit.
Perform POWERTRAIN VERIFICATION TEST VER - 1
(DIESEL). (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL
MODULES/ENGINE CONTROL MODULE - DIAGNOSIS
AND TESTING)


9. (K31) FUEL CONTROL ACTUATOR RETURN CIRCUIT SHORTED TO ANOTHER CIRCUIT
Measure the resistance between the (K31) FCA Return circuit in the
ECM harness connector and all other circuits in the ECM connectors.8
Is the resistance less than 10 Ohms?
No >> Go To 10
Yes >> Repair the (K31) FCA Return circuit shorted to another circuit.
Perform POWERTRAIN VERIFICATION TEST VER - 1
(DIESEL). (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL
MODULES/ENGINE CONTROL MODULE - DIAGNOSIS
AND TESTING)


10. ECM
Reconnect the ECM harness connectors.
Ignition on, engine not running.
Disconnect the Electronic Fuel Control Actuator connector.
Connect an incandescent test light across the Fuel Control Actuator
driver pin and the Fuel Control Actuator return wire at the fuel control
actuator connector.
Observe the test light.
The ECM will perform a self test of the circuit which should momentarily
flash the test light brightly, one time, approximately 20 seconds after
being connected.
NOTE: Compare test light brightness to that of a direct connection
to the battery.
Did the light flash brightly?
Yes >> Refer to the INTERMITTENT CONDITION Symptom (Diagnostic
Procedure). (Refer to 9 - ENGINE - DIAGNOSIS
AND TESTING)
No >> Replace the ECM.
Perform POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL). (Refer to 8 - ELECTRICAL/ELECTRONIC
CONTROL MODULES/ENGINE CONTROL MODULE - DIAGNOSIS AND TESTING)

 

Thanks for the info...yes I have gauges, and I have noticed that the exhaust runs approx. 200-250 degrees hotter than normal. The guy at the diesel shop said that the pump might be leaking internally into the crankcase, but has no way to pump it up to 25,000 psi to check it...I think I will try what you recommended tomorrow. I also noticed that after I disconnected the edge box and nailed the throttle that the boost went to 30#, but the truck wasn't really getting any faster...

 

This might be a stupid question, but how exactly is this done? I have the connector off, but do I leave the test light hooked to the ground still or try and rig up something to stick into the harness connector to get ahold of the connections in the harness...I don't know if this makes any sense...help