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HELP!! I have a 2000 F-350 with the 7.3L in it. I have been have some issues with the CPS and have just replaced it with the NEW Grey CPS from the recall...

When I turn the key to "on" the "Water in Fuel" and "Wait to Start" lights blink once and stay off. The "Service Engine Soon" light stays on. I cannot hear the fuel pump cycle where under normal conditions, you can. I can crank and crank but the engine will not fire. Also, when you turn the key to the "on" you can hear a relay click on and the off in conjunction with the two indicator lights above.

The history is as follows: The original cps when out about 6 months ago and was replaced with a NAPA version. This fixed the problem until about a month ago. I was driving through an intersection and the engine cut out. As I coasted through, the engine would fall off to about 2-300 rpm and then race back to about 1000-1100 rpm. It did this as I coasted to a stop and waited for it to settle down. As the engine would fall, the "Water in Fuel" and "Service Engine Soon" lights would come on and then go off when the engine came back and raced to life. The engine cycled like this for approximately 6 cycles and then died. I key the engine and it didn't start exhibiting the same characteristic as above. I drained the fuel from the filter and tried again. I had to cycle the key 8-10 times before the fuel pump kicked in and the engine fired again. Once it fired I drove it to a service station and they tried to pull the codes. The reader was a Snap-on unit and it stated that there were no codes. I drove it home and parked it. I tried to restart last week and it is doing it again. Using my other vehicle, I got the new cps and installed it. No change. I tried unplugging my Hypertec tuning module and that didn't change anything.

I checked all the fuses and relays in the cab and engine compartment, pulled the fuel bowl heater wire, waited with the key on... Nothing. Later, it did start up, run for a few minutes, then die. When it died, it sounded like someone shut it off. While cycling the key, on the times that it would start, you could hear one of the two relays behind the fuel filter engage, otherwise, it would not. Also, after cycling the key about half a dozen times the doors would lock and the unlock spontaneously.

Does anyone have any ideas??? I have read that being a 1-ton, the ECM does not fall under the gov's regulations for OBD-II and therefore I need a special code reader. Anyone have any recommendations for a code reader under 300-400 dollars? Is there an Actron code reader that anyone has successfully used on this particular truck? :dunno::dunno::dunno:
 

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You can use a standard OBDII scanner just have to get a real good one to read codes on a diesel.

I believe your PCM is the problem though. I suggest you hook a scanner to it, if you get an error unable to connect on the scanner screen then my beliefs are correct and your pcm is no good.
 
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