Thread: Quick Fix: 1985 w123 Tach & A/C after EGR Failure
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Old 07-24-2013, 02:30 PM
pmckechnie pmckechnie is offline
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Join Date: Jan 2003
Location: Matthews, NC
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The signal goes through the EGR controller to keep people from removing the controller to disable the EGR. This was probably mandated by our Federal Government. They have been doing things like this for many years.

Paul
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