1994 E420 EGR Valve

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1994 E420 EGR Valve

06-10-2011, 01:24 AM

4wheeling

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Join Date: May 2007

Posts: 74

1994 E420 EGR Valve

The CE light came on with code 5. I clean the EGR valve and tested it to make sure it works when vacuum is applied and it does. The code always returns after a few cycles. I cleaned the passages as best as I can using brake cleaner and speedo cable.

The only thing I can't figure out is when is there suppose to be vacuum at the EGR valve?

How long does it keep the EGR valve open?

What is basic sequence of EGR operation?

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