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Why it sounds like it's jake braking when I lay off the throttle? The jake brake is not even switched on either?

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Denis Aube

Expert 142 Answers
Posted on Mar 23, 2015

Denis Aube

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Joined: Apr 10, 2008

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Jake brakes are controlled by electro-mechanical solenoids that are screwed in the Jake housings on top of the camshafts and rocker arms. Oil passes through these solenoids when they are switched on, and oil pressure is what opens your exhaust valves up to use the engine as a brake. Sounds like you have one or more of these solenoids that are stuck on, letting oil by all the time. Another thing could be a bad Jake Brake On/Off switch, letting power by even if it's off... (doubt that would be it though, but it could be)

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01 Detroit 60 series jake and cruise control stopped working, replaced clutch switch cruise now working but jake still doesn’t?

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Why it sounds like it's jake braking when I lay off the throttle? The jake brake is not even switched on either?

1 Answer

Denis Aube

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Related Questions:

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Trustworthy Expert Solutions

Why it sounds like it's jake braking when I lay off the throttle? The jake brake is not even switched on either?

1 Answer

Denis Aube

Add Your Answer

Attachments: Added items

Related Questions:

01 Detroit 60 series jake and cruise control stopped working, replaced clutch switch cruise now working but jake still doesn’t?

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Plus I noticed that the exhaust brake is on 100% of the time. Under the dash I found a wire with a push on connector that is labeled exhaust brake but not hooked up, is that ok ?

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