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Old Jun 9, 2004 | 11:20 PM
  #1  
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hontechs
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EXPERTS!!! please help

ok here is the scenerio. i have a 95 psd dually 5spd. just recently the car started doing this. when idling the engine sometimes just suddenly stops. RPM drops to 0 and engine turns off. what is weird is that it happens only at times, not all the time.

When driving the truck the rpm suddenly drops and the engine shuts off. I try to put it in gear and start the truck up while rolling, but it can not. I'll have to literally start it up while rolling with the key. When the engine dies I still get full power like for example lights, horns etc etc...

something is causing the engine to have these abrupt stalls. is it the computer? Injectors not working at times? fuel pump giving up? any electrical related problem that can cause this???? PLEASE HELP!!!

I do alot of EFI engines and if this would happen it would almost be 100% a distributor related dilemma, but diesels don't have them. I could be wrong since i'm not deep into diesels and that's why i am here to ask for help.
 
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Old Jun 9, 2004 | 11:25 PM
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94.5turbodiesel
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Sounds like the CMP (Camshaft Postiton Sensor). go to your local International dealer to buy one, they are much cheaper than the ford dealership.
 
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Old Jun 9, 2004 | 11:34 PM
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94.5: holly cow, yeah i think that may be it. i just read some post in here about the cmp sensor. just recently two guys truck in here died to. One guy said his totally died and another said his died and started and died and started up again. NoW what year were these trucks.

and where is the cmp sensor on my "OLD" truck... every LITTLE thing is breaking on this truck ****. engine is still strong, but it eats oil like crazy too. 2hr trip eats up 2 qaurts. despite these problems this truck is waaaaay strong compared to the import trucks i've had.......tows 7000lb like butter...
 
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Old Jun 9, 2004 | 11:41 PM
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94.5turbodiesel
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If looking at the crank pulley from the front of the motor the sensor is located at about 10 o'clock. Right next to the pulley. You can see it if laying under the front of you rig too.
 
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Old Jun 10, 2004 | 12:20 AM
  #5  
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Here is some info for you:

CMP Sensor Location and Part #

CMP Sensor Removal/Installation
 
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Old Jun 10, 2004 | 01:53 AM
  #6  
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The oil burn sounds like the turbo. (If there is no visable leak. ) Seals cook on the turbo and oil cokes up if you shut it down hot. That is why an idle period after driving is a good thing for turbo longevity. Allows the turbo to cool. If you have a turbo temp gauge, never shut the truck down until the turbo temp is below 300 degrees F.
 
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Old Jun 10, 2004 | 05:07 AM
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94.5turbodiesel said:
Sounds like the CMP (Camshaft Postiton Sensor). go to your local International dealer to buy one, they are much cheaper than the ford dealership.
Great diagnosis.

The Grinch said:
The oil burn sounds like the turbo. (If there is no visable leak. ) Seals cook on the turbo and oil cokes up if you shut it down hot. That is why an idle period after driving is a good thing for turbo longevity. Allows the turbo to cool. If you have a turbo temp gauge, never shut the truck down until the turbo temp is below 300 degrees F.
Another good diagnosis, but it could also be injector O-rings failing causing the oil consumption. If the O-ring on one cylinder were seeping oil into the fuel, it would merely burn off. However, if this were happening, the fuel filter would become discolored from the oil in the fuel system. I'd pull the fuel filter to see if this is the case. O-rings are a lot cheaper/easier to fix than turbo problems.
 
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Old Jun 10, 2004 | 10:21 PM
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thx guys....

quadizilla: i have replaced the orings and the diesel fuel in my filter is normal colored... i think either the cyl walls or yeah the turbo.. no shaft play on the wheels though...

let me know what you guys think???
 
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Old Jun 11, 2004 | 07:28 AM
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Quadzilla.....when you say the fuel filter is discolored if oil is passing by the O-rings on injectors, what color are we talking about? My filter is a dark grey whenever I change it.
 
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Old Jun 12, 2004 | 12:10 AM
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Originally Posted by Dieselman929
Quadzilla.....when you say the fuel filter is discolored if oil is passing by the O-rings on injectors, what color are we talking about? My filter is a dark grey whenever I change it.
It will be black, as in "black as oil". Dark yellow to a brownish grey is typically considered normal.
 
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Old Jun 13, 2004 | 01:21 AM
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Cookie88....thanks for the reply. Hey, I'm changing my vacuum pump in the morning, '97 F350 PSD,... am I gonna have to remove the fan to get that puppy out of there? Shop manual says yeah but I need to look at it first.
 
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