I didn't try driving my car with the sensor unplugged. Idle would jump to 1k RPM and throw a code. I'm still dealing with this issue, which I think might be a vacuum leak somewhere. It happens when the car is "hot" after driving for awhile. It goes away after restarting.
I got mine from Z1, but I'm sure you can find one from the junkyard somewhere. It's about 1/3 the cost of a new one. I've been reading about symptoms of a failed MAP sensor, and most of my issues were similar: hesitation, lost power, etc. It's something I've dealt with even while bone stock. I can tell you even with my oil temps around the 200F range throttle response is still great.
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