Western Star with C-15

[Rooster75]

I have an 06 Western Star with twin turbo C-15. It’s having an issue I’m assuming is in the computer parameters. It has recently had a platinum rebuild done & trans rebuild. Truck is showing a calibration code & fuel pressure code. Now it will only run 55mph & tacs about 1400. In neutral it’ll tac 19-2k. I am currently waiting on a mechanic who has the customer Cat software to check it out. The codes were read with a snap on reader. Any ideas or advice greatly appreciated. Thanks on advance.

 

[Truck Shop]

Wait on the guy with the putty cat software.

 

[rmllarue91]

Did u put fuel pressure gauge on it does it act up more on hills or loaded?

 

[Rooster75]

Did u put fuel pressure gauge on it does it act up more on hills or loaded?

I did not put gages on it. The mechanic coming will. So far it doesn’t matter what kind of terrain & I haven’t loaded it since it started this issue. Running empty down the toad 55mph is it. I did hit the jakes & for whatever reason when I got back on it it ran on up to 7mph. Few minutes later it started dropping back to 55mph. Been through way ever since.

 

[Nige]

Truck is showing a calibration code & fuel pressure code.

Do you have the Codes written down somewhere.?
Also the engine Serial Number would be a help.
On the face of it a calibration Code is going to need ET to do the calibration procedure.

 

[Rooster75]

Got the laptop hooked up to it this past week. It shows engine speed calibration not performed (42). It also shows vehicle speed signal out of range (36). Can these be corrected through the customer version without taking to CAT?

 

[Nige]

I think you are going to have to get the Cat house involved, or a local independent mechanic who has ET.
I've sent you some information but I don't know iif you will be able to do it alone.

 

[terex herder]

I have been told most truck engines won't behave if the vehicle speed signal is wrong or missing. I also have personal experience to verify in one instance.

Does your speedometer work properly?

 

[Truck Shop]

Over charging will/can throw input to tach off also. Causing issues.

 

[Rooster75]

I have been told most truck engines won't behave if the vehicle speed signal is wrong or missing. I also have personal experience to verify in one instance.

Does your speedometer work properly?

No Sir. Pegs out. Only way I know it’s 55 I had my wife behind me & asked her to check my speed.

 

[Rooster75]

G

Over charging will/can throw input to tach off also. Causing issues.

Guy with snap on reader did say voltage wasn’t consistent

 

[Nige]

Did you get those attachments I sent to you.?
Take a look at the special tooling necessary for carrying out the timing calibration. If that was not done when the engine was rebuilt I'd suggest doing that first and see where that leads you.

 

[Rooster75]

Did you get those attachments I sent to you.?
Take a look at the special tooling necessary for carrying out the timing calibration. If that was not done when the engine was rebuilt I'd suggest doing that first and see where that leads you.

I did but for some reason I can’t open them.

 

[Nige]

You likely won’t be able to open them on a smart phone even though they are standard Adobe pdf documents. Try downloading them to a laptop or PC.

 

[dieseldog5.9]

If you have google maps on your cell phone, it will tell you how fast you are going when in navigation to a destination.

I would take a look at the speedo sensor on the transmission and look for any damage to wiring, also pull the radiator cap and look for fuel in the radiator. Kind of a hail marry play but it is something.

Western Star also pulls the power feed for the computer directly off of the battery, couldnt hurt to look at the wiring in the battery box and verify all connections are good.