[Tuffguy707]

well i replaced the rail pressure sensor and the truck still wont start. i cracked a injector line and im not getting any fuel through the line. im assuming its the cp-3 or the FCA. does anyone else have any suggestions?

 

[Tuffguy707]

oh i also made sure the grid heater didnt kick on and tried either. the truck still didnt start so im assuming its not injectors or am i wrong? could it still be the injectors?

 

[Irish Maniac]

there is some good troubleshooting guidance in this thread.

http://www.cumminsforum.com/forum/3rd-gen-powertrain/564914-cp3-failure.html

 

[Tuffguy707]

thanks ill check it out

 

[Tuffguy707]

im not getting any fuel at all into the rail. im getting fuel from the fass to the cp-3 but non to the rail at all. i took the plug out of the rail and not a thing came out.

 

[Connor Trahan]

Any fuel in your oil?

 

[Tuffguy707]

no fuel in the oil

 

[Tuffguy707]

could it be the FCA? i just hate to keep buying parts when it could be the cp-3. i already have $200 in the rail pressure sensor and the FCA is around $100 or so.

 

[Tuffguy707]

could a bad battery or battery connection cause this? i put two new batteries in the truck last summer but as i think about it i know if both batteries are not good or the connections are bad it can cause issues. i just dont know if a bad battery or connection could cause the pump not to work?

 

[Irish Maniac]

so while you are cranking the motor no fuel is getting to your motor.

call either one of these guys and talk to them. They are experts in their field.

Home

Motorsport Diesel

tell them your issue and let them get you sorted out.

 

[Tuffguy707]

No I'm not getting any fuel from the cp-3.

 

[WVcummer]

If you have cracked the line from the cp3 that runs to the rail and don't have fuel coming out while cranking then I would suggest the following.

Start by unplugging the FCA,try to start the truck.If it start's then normally that means the FCA is working? Yes.Is it working correctly? Maybe not.

Something else you can do is take the FCA off the cp3,You do not need to remove the cp3 to do this.You will need to get a torqx "Spelling" bit to remove the FCA it is a size 25....There is 3 bolts holding it on to the cp3 they are not easy to get to but can be done.Once you have them removed wiggle the FCA out.

After it is out take two wires and hook them to your battery and touch the prongs on the inside of the FCA where it plugs in on the truck.It does not matter which is neg and which is positive.If you do this and the FCA doesn't "POP" then it is no good.

FYI take it easy on the bolts holding the FCA to the cp3 they can/will strip easy

 

[Tuffguy707]

Unplugging the fca didn't work. Ill try that. Thanks

 

[Tuffguy707]

It's going to the dealer. I'm not spending any more money on parts that are not broke nor do I want to take a chance and brake something. Thanks for your help guys.

 

[1985cucv]

do you have any codes?

 

[WVcummer]

It's going to the dealer. I'm not spending any more money on parts that are not broke nor do I want to take a chance and brake something. Thanks for your help guys.

Well please let us know what it turns out to be,mine won't start either.I took the injectors out to be tested.Put I also had fuel going to the rail,with a snap on scanner on it..it would only read 84 PSI while cranking.

 

[Tuffguy707]

Yeah I had a low rail pressure code which I thought was the rail pressure sensor and now I have a low ECM/PCM voltage code but I think the later code popped up because the batteries are starting to get weak from as many times and I've tried cranking it.

 

[Tuffguy707]

Ill let you know. Hopefully I find out today.

 

[waywardtravel]

I'm still a confused. When you used either did it act for a few seconds that it was running while running on the either. IT should if you have compression.

 

[Tuffguy707]

Yeah it tried to start on the either.