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Daniel Wilson
Daniel Wilson,
Category: Medium and Heavy Trucks
Satisfied Customers: 2051
Experience:  Owner at DJ Wilson
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I have 2004 volvo vn d12 i have exhaust brake issues. at

Customer Question

hi i have 2004 volvo vn d12 i have exhaust brake issues. at idle after 5 min. the engine starts to choke it self out then come back to idle over and over. i hooked up ptt and found that exhaust brake was fully closing during warm hold. did warm hold test at 30% and exhaust brake fully closed. my question is the exhaust brake supposed to fully close at 40 psi. also inspected spring inside epg and it was not broken
Submitted: 10 months ago.
Category: Medium and Heavy Trucks
Expert:  Doug Barnowski replied 10 months ago.

Hi, my name is Doug.

The exhaust brake is on at idle position.

If you have any codes if you haven't cleared them it would be great, but to me it sounds like an egr valve is sticking open. The D12 has two egr valves, and if you have PTT you can operate each one separately to see which one is not operates normal.

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