MISFIRE
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MISFIRE
I HAVE A 04 F350 6.0 WITH 183,000 MILES HAS NEW HPOP AND INJECTORS ABOUT 2 YRS OLD, HAVE DEVOLPED A MISS WHEN COLD OR HOT WITH WHITE BLUE SMOKE ON START UP ALSO IS SLUGGISH. I HAVE A SOLUS PRO SCANNER THIS MORING WHILE ENGINE IS COLD DONE A IJECTOR BUSS TEST SHOWED ALL 8 INJECTOR CIRCUITS LOW AND NIMBER 1 GLOW PLUG BAD, CLEARED CODES RAN TEST AGAIN THIS TIME NO DTCS THIS ALL WAS BEFORE ENGINE WAS STARTED CAN RUN KOER AND GET NO CODES, HAVE DONE THE WIGGLE TEST ON HARNESS BUT FOUND NOTHING WITH SCANNER ON DROVE UNIT LAST NIGHT FICM POWER NEVER DROPPED BELOW 47V BATTERY NOT BELOW 13V. SO WHAT SHOULD I DO NEXT. 
Hotshot
Joined: Dec 2003
Posts: 15,369
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From: Stuttgart, Ar
You can still have a failed FICM with the proper voltage, especially showing low voltage codes for all injectors. What does the FICM power show cranking and at 2K rpm's cold? What does the battery do cranking?
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IF CRANKING FICM VOLTAGE IS GOOD RUNNING VOLTAGE GOOD BUZZ VOLTAGE GOOD BATTERY VOLTAGE GOOD SHOULD TH FICM BE GOOD
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Hotshot
Joined: Apr 2010
Posts: 19,072
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From: Saratoga Springs,UT
Guess there a chance its an Old DTC
They usualy reset after so many drive cycles
Post it all up then at KOEO/Low Idle/High Idle(2500rpm)
BARO
MAP
EBP
FICM MP
FICM VP
FICM LP
FPW
ICP
ICPV
IPR%
Volt
RPM
V-Ref
Lets see what ya Got
They usualy reset after so many drive cycles
Post it all up then at KOEO/Low Idle/High Idle(2500rpm)
BARO
MAP
EBP
FICM MP
FICM VP
FICM LP
FPW
ICP
ICPV
IPR%
Volt
RPM
V-Ref
Lets see what ya Got
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Hotshot
Joined: Apr 2010
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From: Saratoga Springs,UT
Not Always the Case
Lets see what your actual numbers are
Postmaster
Joined: Jan 2005
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From: BC Canada
Not necessarily. Power side of FICM, at 47 volts is good, I would run it cold and higher rpm in park and test, then run on the road and watch it? Even if the power board is good the other side can be bad where it drives the injectors. When it's cold does it have a hard rime revving over 2000 rpm? That's what mine did, low injector codes, 47 volts, 12.5 on batteries, but when cold it would struggle to hit 2000 and then shift. New FICM from Ed, atlas 40, and start up quicker, no codes, revs past 2000 cold, and smooth as when hot, pulls better through the gears. Snappy difference. Changed FICM at 100k miles.
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IM NOT ABLE TO GIVE YOU READINGS HAD TO RETURN SCANNER MY FRIEND NEEDED IT AT HIS WORK BUT THE ONLY CODES I GOT THRU THIS TIME, WAS NUMBER ONE GLOW PLUG AND ALL EIGHT INJECTORS CIRCUITS LOW, LAST TIME I RAN SCANNER AFTERS CLEARING DTCS I GOT NO CODE AT ALL. UNIT WAS COLD NOT STARTED EVEN AFTER UP TO TEMP RAN KOER SHOWED NOT DTC. ONE TIME WHEN UNIT WAS COLD I RAN THE BUZZ TEST AND THOUGHT THERE WAS A PAUSE BETWEEN ONE OF THE INJECTORS CLICKING TEST BUT COULD NOT TELL WHICH ONE. COULD HAVE BEEN JUST ME. SINCE I PUT THE POWER PAK IN THE FICM TRUCK STARTED BETTER COLD AND HOT, IF IT WASN'T THE MISFIRE WHICH IS HOT OR COLD AND CAN NOT TELL ANY DIFFERENCE IN MISIFRE
Cargo Master
Joined: Jun 2007
Posts: 2,723
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From: Roseburg, OR
IM NOT ABLE TO GIVE YOU READINGS HAD TO RETURN SCANNER MY FRIEND NEEDED IT AT HIS WORK BUT THE ONLY CODES I GOT THRU THIS TIME, WAS NUMBER ONE GLOW PLUG AND ALLEIGHT INJECTORS CIRCUITS LOW, LAST TIME I RAN SCANNER AFTERS CLEARING DTCS I GOT NO CODE AT ALL. UNIT WAS COLD NOT STARTED EVEN AFTER UP TO TEMP RAN KOER SHOWED NOT DTC. ONE TIME WHEN UNIT WAS COLD I RAN THE BUZZ TEST AND THOUGHT THERE WAS A PAUSE BETWEEN ONE OF THE INJECTORS CLICKING TEST BUT COULD NOT TELL WHICH ONE. COULD HAVE BEEN JUST ME. SINCE I PUT THE POWER PAK IN THE FICM TRUCK STARTED BETTER COLD AND HOT, IF IT WASN'T THE MISFIRE WHICH IS HOT OR COLD AND CAN NOT TELL ANY DIFFERENCE IN MISIFRE
This points to a bad FICM.
