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HELP 01 cummins 5 speed cutting out at 55mph

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  #11  
Old 05-30-2015, 09:57 AM
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Originally Posted by Jet A Fuel
Any Updates?
Not really it is still doing it I'm gonna take it to the shop
 
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  #12  
Old 05-30-2015, 11:03 AM
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What does the fuel pressure drop to during acceleration or at highway speed. 10 is pretty low at idle.
 
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Old 05-30-2015, 11:21 AM
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Originally Posted by Jet A Fuel
What does the fuel pressure drop to during acceleration or at highway speed. 10 is pretty low at idle.
I've got my fass on so that elimantes that
 
  #14  
Old 05-30-2015, 11:35 AM
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That's good.
Have you visually checked the wiring to the PCM,and ABS controller I agree its electrical.
 
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Old 05-30-2015, 11:44 AM
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Originally Posted by Jet A Fuel
That's good.
Have you visually checked the wiring to the PCM,and ABS controller I agree its electrical.
I've checked all the plug ins on the passenger side firewall. I've also investigated as much wiring as I can. I guess I need to do a more thorough investigation of the wiring. There is either a short somewhere or a bad control module. Does the tps communicate with the speed sensor?
 
  #16  
Old 05-30-2015, 11:59 AM
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To my knowledge the Powertrain Control Module takes logic signals from all the various sensors: crank, speed,timming, fuel,TPS, and processes them if it sees an open circuit or out of range signal usually only milivolts it throws a code or a warning light.
I believe that the ABS controller works the same only just for the ABS. It may all feed to the PCM for setting the lights off in the cab. just not sure without digging in a schematic.
 
  #17  
Old 05-30-2015, 12:03 PM
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I guess I need to see if I can come up with a wiring diagram and go from there
 
  #18  
Old 05-30-2015, 12:30 PM
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Cool keep us posted thanks wish I could be of more help.
 
  #19  
Old 05-30-2015, 01:26 PM
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Originally Posted by Jet A Fuel
Cool keep us posted thanks wish I could be of more help.
I will thanks for the replies let me know if you think up anymore ideas
 
  #20  
Old 05-30-2015, 02:42 PM
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I forgot about this little tool I was digging back through some threads and found this.
EBSCOhost Login
enter tech for login and password find the auto repair section and enter your vehicle type.
It has schematics and other useful tech data.
 


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