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Cat Man
Cat Man, Cat Engine Expert
Category: Construction and Road Equipment
Satisfied Customers: 8419
Experience:  I am ASE Master Certified.
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On a c7 the engine has no power and shuts down after 60

Customer Question

on a c7 the engine has no power and shuts down after 60 seconds.
two codes came up on the computer
641-9
651-7
new turbo less than a year
Submitted: 4 months ago.
Category: Construction and Road Equipment
Expert:  Cat Man replied 4 months ago.
Thanks for asking your question. I will try and help you out.
Can you get me the engine serial number please?
Also what service tool are you using? Cat Et?
Expert:  Cat Man replied 4 months ago.
Code 641-9 is a turbo VGT fault.
Code 651-7 is a number one injector fault.
These should not cause a shutdown but will cause low power.
Are you using Cat ET with Cat Comm and dual datalink?
Customer: replied 4 months ago.
Im waiting
Expert:  Cat Man replied 4 months ago.

For some reason I am not able to accept your phone request. Not sure why.

Customer: replied 4 months ago.
what an i supposed to do?
Expert:  Cat Man replied 4 months ago.
Are you using Cat ET software?
Customer: replied 4 months ago.
ET 2015
Expert:  Cat Man replied 4 months ago.
Are you using a Cat Comm adapter and communicating on dual datalinks J1939 and ATA?
Customer: replied 4 months ago.
Expert:  Cat Man replied 4 months ago.
Thanks for the information.
So you can start the engine and and these codes are active and it shuts down in 60 seconds?
Customer: replied 4 months ago.
But not with the computer hooked up
It stays running, but no power
Expert:  Cat Man replied 4 months ago.
It appears you have a faulty number one injector and a faulty VGT turbo
Customer: replied 4 months ago.
replace the acuator and the # 1 injector
Expert:  Cat Man replied 4 months ago.
That's what in would do.
Make sure number one injector has oil spraying on it from the rockers arms. That's how it cools the injector. If there is no oil. That causes an injector to fail.
Customer: replied 4 months ago.
I'll pass that on
Expert:  Cat Man replied 4 months ago.
Hey. I just wanted to see how things were going. Please let me know if you need more help. I am happy to assist. If my information was helpful, please leave a good or higher rating so that I receive credit. Thanks.
Customer: replied 4 months ago.
I gave you all the answers
You were no help
Expert:  Cat Man replied 4 months ago.
Have a great day sir.

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