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Andy
Andy, Truck Diagnostic Technician
Category: Medium and Heavy Trucks
Satisfied Customers: 1571
Experience:  International trucks, International, Maxxforce and Cummins engines, diagnostic, electrical, Hvac and refrigeration repairs
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Maxxforce 7 Fuel system Monitor Working on a 2012

Customer Question

Maxxforce 7 Fuel system Monitor
Working on a 2012 International Terrastar with the maxxforce 7/allison set up. Intermittent code Spn 3055 fmi 15. No other active or inactive codes. Common problems with the system? Or Diag procedure
Submitted: 1 year ago.
Category: Medium and Heavy Trucks
Expert:  Andy replied 1 year ago.

Hi there . My name is Andy ! Can we start with the last 8 digits of the vin number please ?

Customer: replied 1 year ago.
CJ385837
Expert:  Andy replied 1 year ago.

Thanks

Expert:  Andy replied 1 year ago.

I believe this is a code for fuel rail pressure , but will check it. One moment

Expert:  Andy replied 1 year ago.

Is SPN 3055 FMI 15 the only fault code active?

Customer: replied 1 year ago.
only one active
Expert:  Andy replied 1 year ago.

Inspect fuel system components for signs of visible leaks.

Is the fuel system free of leaks?

Customer: replied 1 year ago.
No leaks, nothing looks questionable
Expert:  Andy replied 1 year ago.

-Key off for at least 1 minute

- Turn ignition switch to ON, engine OFF.

- Listen for the fuel pump (shop noise can drown out the fuel pump sound).

  • The ECM will command the electric fuel pump to to run for 5 seconds. It needs to be very quiet around truck . Can you hear it ?
Customer: replied 1 year ago.
It is running and fuel is returning to the tank for about 5 seconds then stops
Expert:  Andy replied 1 year ago.

If you have servicemax or a way to check low side fuel delivery pressure , then what is the pressure running at when pump is on ?

Customer: replied 1 year ago.
I have logic builder, engine injector metering inlet pressure says 3.61-3.62 psi
Expert:  Andy replied 1 year ago.

Diamond logic builder does not read engine data to my knowledge

Customer: replied 1 year ago.
There was a spot for it on the data stream but I'll get it on servicemaxx tomorrow I didn't have that laptop with me. Thanks
Expert:  Andy replied 1 year ago.

Ok thanks

Expert:  Andy replied 1 year ago.

Any luck

Customer: replied 1 year ago.
I have not been able to get a hold of the truck. Not looking like I will until Saturday
Expert:  Andy replied 1 year ago.

Ok thanks for the update . Will keep in touch .

Customer: replied 1 year ago.
Can you just send me the information from the service manual? I don't know when I'm going to get this truck again. Unless you just want to keep the question open.
Thanks
Expert:  Andy replied 1 year ago.

We can do Skype if you want in an audio format and I should be able to send you what you need that way but you would need to accept the additional offer for me to send you my private contact . You would then search for it on skype and send you a friend request.