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A coworker's EGR is stuck open. It runs like an animal until its halfway warmed up. Without huge amount of ecu interfering driveability suffers because it's confused.
The math whizzes should chime in but I read somewhere that a functioning EGR effectively takes away a good 20% of combustion volume, so a dumb guess would to pull at least that amount of fuel as an experiment. I wouldnt try this in the city, but on a level stretch of road where id have a chance to monitor vacuum and other gizmos id be interested. There are plenty of thermoswitches and actuators on old 1970s and 1980's cars that can be implemented.
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