When you unplug the MAF you will get a CEL. You can easily reset it by disconnecting the battery for a short time (first make sure you have your radio code if your car is pre-2003) or by using a OBD-II reader.
When you unplug the MAF the car freaks out briefly. Then it uses an approximation (based on throttle body temperature readings, I believe) to decide how much air is coming in. The car has a tendency to stall when warmed up and idling. But in my base 1999 Boxster, I could keep up with 2000-2002 BoxsterS cars in flat out acceleration up to very high speeds.
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