Well let's see how good my memory is guys...I believe it (MBE 4000) was introduced in production in November of 2000. Due to a huge legal battle between EPA and the big three diesel engine manufacturers for an alleged emissions violation, the 2004 specifications were going to be pushed up by about a year. Since the MBE 4000 was not in our country in 1998 (When the lawsuit settled and everybody got to pay big fines...) it was not forced into the settlement. However as of January of 2004 it had to comply to 2004 specifications which included EGR. All engines after 2004 would have to have EGR, until 2007 which was the next emissions crunch so more stuff added to it then again in 2010.
I think that is why I don't ever remember an MBE 4000 not having EGR as there were so few early on and I was still fighting EGR issues on Series 60 so I stayed away from the MBE series as long as possible.
Maybe you got a 2003 model engine in your 2004 truck Don??
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