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2005 c13 goes into a heavy miss condition after running

Customer Question
2005 c13 goes into...

2005 c13 goes into a heavy miss condition after running hard, and pulling a load on the engine

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

2005 Peterbuilt c13 acert cat engine

Mechanic's Assistant: Are you fixing your truck yourself? What have you tried so far?

Its a customers truck i am a technition i had tried repairing random small boost leaks no codes present no check engine light

Mechanic's Assistant: Sometimes things that you think will be really complicated end up being easy to fix. The Heavy Truck Mechanic I'm going to connect you with knows all the tricks and shortcuts.

Ok thanks

Mechanic's Assistant: Anything else you want the Truck Mechanic to know before I connect you?

I think ill be good appreciate you starting to help me out

Submitted: 2 years ago.Category: Medium and Heavy Trucks
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Answered in 36 minutes by:
7/17/2020
Technician: Cat Man, Cat Engine Expert replied 2 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.
Verified
Thanks for asking your question. I will try and help you out.
Unfortunately I have seen this many times. Sounds like an Iva is sticking. Iva’s work only under load. When they stick it causes a miss and no codes.
The tough part is finding the faulty Iva. Could be any of the three.Please reply back if you need more help. I am happy to assist.
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Customer reply replied 2 years ago
That's exactly what I was thinkingI'm hooking up site glass now to assure it's not a injection seal but cyl cut out shows no evidence of this
Technician: Cat Man, Cat Engine Expert replied 2 years ago
10-4.Please reply back if you need more help. I am happy to assist.
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Customer reply replied 2 years ago
You are the man. Pulled valve cover and IVA all the way tword back of head had broken plug!
Technician: Cat Man, Cat Engine Expert replied 2 years ago
Cool. Glad you found it. Good job!
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