I'm assuming the "boost sensor" is the MAP sensor located on the inside of the fender on the left side. It has a short tube that runs to the side EGR mixing chamber. Check and make sure you didn't disturb or damage the wiring to it and that the tube is attached.

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-Evan


Benz Fleet:
1968 UNIMOG 404.114
1998 E300
2008 E63


Non-Benz Fleet:
1992 Aerostar
1993 MR2
2000 F250