EGR When Open Increases Idle? (solved)
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Senior User
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From: Southern Nevada
EGR When Open Increases Idle? (solved)
From my reading it seems when I manually activate the EGR valve, the idle should become worse. When I opened my EGR, the idle increased. Am I doing it wrong? I disconnected the tube from the exhaust in order to push up on it.
FTE Legend
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From: Ottawa, Ontario
No you're not doing it wrong but you do have a problem. Fresh air will cause the idle to increase because it is combustable while exhaust is not combustable so it will cause the idle to get rough or even stall the motor if the valve is opened too much. So with the EGR connected to the exhaust there should be no fresh air getting in, if there is you have a leak in the EGR tube and it needs to be replaced.
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Senior User
Joined: Jul 2007
Posts: 138
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From: Southern Nevada
No you're not doing it wrong but you do have a problem. Fresh air will cause the idle to increase because it is combustable while exhaust is not combustable so it will cause the idle to get rough or even stall the motor if the valve is opened too much. So with the EGR connected to the exhaust there should be no fresh air getting in, if there is you have a leak in the EGR tube and it needs to be replaced.
Thank you both!
Fleet Owner
Joined: Oct 2005
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From: Kentucky
That made the light bulb turn on, thank you. Of course, that makes sense. The test was performed with the EGR tube disconnected because I don't know of any other way to manually activate the EGR valve without a vacuum pump (something I don't have). I'm guessing if it had a leak, I'd hear it? I hear no leak.
Thank you both!
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