03 5.9 code poo88
 

HI GUYS, ME AGAIN. MY TRUCK HAS NO GET UP AND GO AFTER HALF THROTTLE.CHANGED FUEL FILTER, CHECKED FUEL FLOW TO FILTER SEEMS GOOD, CHECKED RETURN LINES, INJECTION CONTROL PRESSURE AT IDLE IS 6000 @1700 RPM CRUSING IS 12,500 FULL THROTTLE IS 19,000 PLUS. I REPLACED THE INJECTOR TIPS BECAUSE BEFORE IT WAS MISSING SPUTTERING AND SMOKING.COULD PASS A SCHOOL BUS IN 1.5 MILES. LOL AFTER REINSTALING INJECTORS IT HAD A LITTLE MORE POWER, RAN SMOOTHER BUT LOUD NOT YOUR NORMAL CR. TODAY I CHECKED THE WIRING OF THE POST ON THE INJECTORS AND PREFORMED THE TEST OF MAKING THE INJECTOR MISFIRE TO HEAR A CHANGE. ALL MADE CONSIDERABLE DIFFERENCE.BEFORE NOW I WAS RUNNING BULLEY DOG TRIPPLE DOG AND TORQUE DOG.BOTH HOOK TO THE MAP SENSOR AND RAIL PRESSURE SENSOR. COULD ANY OF THESE HAVE AN EFFECT IN THE WAY THE TRUCK IS ACTING? ANY ADVICE WELCOMED

Caps lock on means your yelling. Next time..please normal grammar. Now as far as the code, I will be happy to look it up for you. Be a few minutes.

P0088 - fuel rail pressure signal is above max limit

Possible causes are: Fuel Control Actuator (FCA, located on the back of the CP3), fuel pressure sensor, or intermittent condition

1. Fuel Pressure Sensor
Using the scan tool, compare the scan tool reading for fuel pressure set point to the scan tool reading for actual fuel
pressure.
Does the actual fuel pressure correlate with the fuel pressure setpoint while operating the engine over
various operating conditions?
Yes >> Go To 2
No >> Check the electrical connector of the Fuel Control Actuator, if the connection is tight, replace the fuel
control actuator.
Perform POWERTRAIN VERIFICATION TEST VER - 2 (DIESEL). (Refer to 8 - ELECTRICAL/ELECTRONIC
CONTROL MODULES/ENGINE CONTROL MODULE - DIAGNOSIS AND TESTING).
2. FUEL PUMP
Turn the ignition on.
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 >> Replace the fuel pump.
Perform POWERTRAIN VERIFICATION TEST VER - 2 (DIESEL). (Refer to 8 - ELECTRICAL/ELECTRONIC
CONTROL MODULES/ENGINE CONTROL MODULE - DIAGNOSIS AND TESTING)
No >> Refer to the INTERMITTENT CONDITION Symptom (Diagnostic Procedure). (Refer to 9 - ENGINE -
DIAGNOSIS AND TESTING)

sorry wildbill,try to tone it down. thanks for the test. i'll give it a shot tomorrow and let you know the results.:w2:

Sounds good. :U:

You already have a current thread on your issues refer to it for help

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