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I have a2001 Cat c15 6NZ43176 .The engine brake works fine…

Customer Question
I have a2001 Cat...

I have a2001 Cat c15 6NZ43176 .The engine brake works fine on low in medium &high it will come on then get weak for 3or4 seconds then on strong for 3or4 seconds in a cycle

Mechanic's Assistant: What's the make/model/year of your truck? Engine type?

2001 KW cat c15 6Nz43176

Submitted: 3 years ago.Category: Medium and Heavy Trucks
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Answered in 22 minutes by:
4/2/2019
Technician: Cat Man, Cat Engine Expert replied 3 years ago
Cat Man
Cat Man, Cat Engine Expert
Category: Medium and Heavy Trucks
Satisfied Customers: 10,344
Experience: I am ASE Master Truck Certified.
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Thanks for asking your question. I will try and help you out.
Does the yellow check engine light come on when this happens?
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Customer reply replied 3 years ago
Sorry for delay had to do another job. No check engine light , No codes .
Technician: Cat Man, Cat Engine Expert replied 3 years ago
Thanks for the information.
Sounds like a mechanical problem with either jake on 1 and 2. Or 5 and 6. Sounds like one is cutting out. Could be an oil leak on the housing or broken springs.Please reply back if you need more help. I am happy to assist.
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