The new systems don't match rpms.

You should first look to an actual value implausibility. Press and hold the rest button till the display changes. Click the auto buttons each side to run through the numbers. Number five is evap temp. The first few numbers are temp sensors and if tested first thing in the morning they all should be the same (before running the car).

__________________
Steve Brotherton
Continental Imports
Gainesville FL
Bosch Master, ASE Master, L1
33 years MB technician