7.3 SHUTS OFF WHILE DRIVING, STARTS BACK UP BUT WILL REPEAT. I HAVE REPLACED CAMSHAFT..HELP!!!
kellyPHD
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Welcome to the org!
Generally speaking without getting to deep its an IPR issue. (but don't start buying parts, it leads to headaches and a thin wallet) But you really need to get a monitor to read some vital sensor reading. These trucks need a minimum value from the ICP sensor and IPR when running. I.E. if the IPR starts to stick open it lets the high pressure oil pump pressure bleed off causing it to die, and not start.
The fuel tank is another source of issues-Are you by any chance close to 1/4 tank when this happens or does it do it regardless?
Was there any work done recently i.e. last few months?
Any mods to the engine, programmer/chip, electrical add ons?
Any codes, service engine soon, check engine light?
Generally speaking without getting to deep its an IPR issue. (but don't start buying parts, it leads to headaches and a thin wallet) But you really need to get a monitor to read some vital sensor reading. These trucks need a minimum value from the ICP sensor and IPR when running. I.E. if the IPR starts to stick open it lets the high pressure oil pump pressure bleed off causing it to die, and not start.
The fuel tank is another source of issues-Are you by any chance close to 1/4 tank when this happens or does it do it regardless?
Was there any work done recently i.e. last few months?
Any mods to the engine, programmer/chip, electrical add ons?
Any codes, service engine soon, check engine light?
I work at a shop and asking on behalf of my tech working on this, Im just looking for answers...Let me get this to him, and get back with you with a response...fuel tank i know is good, filter was changed...icp ....cps all replaced. Grabbing tech now..BRB
by mitchell icp and ipr numbers are on the money when it shuts off, also notice that when shuts off the cluster goes dead, comes right back on along with glow plug light....as if the key has been cycled to off then to on...but it hasnt
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This is not so related but the fuel bowl heater is connected to the power source of the PCM so when the fuel bowl heater shorts it kills the ecm. I would unplug the wire connector on the back of the fuel bowl and replace the fuel bowl heater fuse.
Also Im wondering if there is an IDM specific code. Most scanners wont pick it up and it does not show a CEL most times. If you have a laptop grab a usb to OBDII adapter and download the free program forscan. It works very well on powerstroke diesels and is worth its weight in gold and is FREE.
Also Im wondering if there is an IDM specific code. Most scanners wont pick it up and it does not show a CEL most times. If you have a laptop grab a usb to OBDII adapter and download the free program forscan. It works very well on powerstroke diesels and is worth its weight in gold and is FREE.
I understand what you are saying, but with this fuse blowing..then what allows it to start back up? is this in fact a fuse or a circuit breaker?
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12,094 Posts
If the fuel bowl heater has a short it kills power to the ecm. Unplug it and replace the fuse and leave it unplugged. If it does not die more then simply leave it unpugged. Its not needed and only causes issues. If it still randomly dies then there is something fuel related or what I personally suspect a wire/mechanical issue with the IPR or a soft code that needs to checked relating to the IDM
IDM HAS BEEN REPLACED...WE DO HAVE CODE=P0231, FUEL PUMP SECONDARY CIRCUIT LOW. BUT WITH LOW PRESSURE FUEL PRESSURE GAUGE READING 65 PSI AND IPR READING OF 600 PSI.
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12,094 Posts
usually fuel pump relay, or pump issue for that code.
thank you so much for your help, will have tech address fuel bowl heater...Feeling so much better bout this job already, truly appreciate you
ICP sensor voltage, the pressure reading can be inferred, so not accurate without voltage to back the reading up
I suggest downloading ForScan and using the OBDLink MX+ or the BAFX adapter
Torque Pro would be good for everyday use
the "free" license is all that is needed
www.obdlink.com
Would be nice if you posted the numbers
Post (before it starts and also during the long crank):
ICP pressure
ICP volts
ICP desired
IPR duty cycle
Cranking rpm
Fuel (injector) pulse width
FICM M-Power
FICM L-Power
FICM V-Power
Sync (FICM and Cam/Crank)
MAP
BARO
EGP
I suggest downloading ForScan and using the OBDLink MX+ or the BAFX adapter
Torque Pro would be good for everyday use
the "free" license is all that is needed
MX+ Support
Check out all the starting guides and documents for the OBDLink® MX+ from OBDLink®. Purchase your powerful scan tool today!
www.obdlink.com
BAFX Products® - Wireless Bluetooth OBD2 Reader / Scanner for Android Devices
The best bluetoothe OBDII reader for Android devices on the market today! Guaranteed to work on ALL OBDII compliant vehicles! Not just a few! Backed by 2 Year warranty from BAFX Products®
bafxpro.com
Would be nice if you posted the numbers
Post (before it starts and also during the long crank):
ICP pressure
ICP volts
ICP desired
IPR duty cycle
Cranking rpm
Fuel (injector) pulse width
FICM M-Power
FICM L-Power
FICM V-Power
Sync (FICM and Cam/Crank)
MAP
BARO
EGP
POSTING NUMBERS,ICP sensor voltage, the pressure reading can be inferred, so not accurate without voltage to back the reading up
I suggest downloading ForScan and using the OBDLink MX+ or the BAFX adapter
Torque Pro would be good for everyday use
the "free" license is all that is needed
MX+ Support
Check out all the starting guides and documents for the OBDLink® MX+ from OBDLink®. Purchase your powerful scan tool today!BAFX Products® - Wireless Bluetooth OBD2 Reader / Scanner for Android Devices
The best bluetoothe OBDII reader for Android devices on the market today! Guaranteed to work on ALL OBDII compliant vehicles! Not just a few! Backed by 2 Year warranty from BAFX Products®bafxpro.com
Would be nice if you posted the numbers
Post (before it starts and also during the long crank):
ICP pressure
ICP volts
ICP desired
IPR duty cycle
Cranking rpm
Fuel (injector) pulse width
FICM M-Power
FICM L-Power
FICM V-Power
Sync (FICM and Cam/Crank)
MAP
BARO
EGP
FIRST SET WILL BE -
Key. On. Engine. Off. (KOEO)
SECOND SET WILL BE -
Key. On. Engine. Running (KOER)
ICP pressure *0 *650psi
ICP volts *.22 *1.10
ICP desired *do not pid
IPR duty cycle *15% *14% (long crank *35%)
CRANKING RPM
FUEL INJECTOR PULSE WIDTH *5.34 *2.47
FICM M-Power *THIS VEHICLE HAS IDM
FICM L-Power *THIS VEHICLE HAS IDM
FICM V-Power *THIS VEHICLE HAS IDM
Sync (FICM and Cam/Crank) *THIS VEHICLE HAS IDM
MAP *14 *14
BARO
EGP *14.9% BOTH WAYS
not that he is not seeing it, didnt do it...i put him on other job real quick...truck starts fine...starts up every time it shuts off...feel like it has something to do with temp
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12,094 Posts
Also the IPR readings are the commanded readings from the ECM. I would pull the IPR check the wiring, solenoid, and o rings... I am personally feeling its IPR related at this point the fact it starts and dies kind of randomly.
I agree Justin
was leading in that direction, but information on this problem is still kinda vague
finally 14 posts in there is a little info
yes like key is turned off, just shuts down. yes starts right back up....while here at shop its idling and will turn off...customer complaint driving down road and gets to stop light and cuts off.
also readings at cranking
rpm cranking 200
when starts 764
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