the map should be held on by two screws, simple to change. use a honda part to replace it, it's important in sensor rank. you need a scanner that gives you data list. at idle it should read about a volt or little less. you could backprobe the wires to the map with the engine idling and check it that way, it's a three wire setup. one is ref. voltage, one's voltage to computer(this one should read 1 volt) and one is ground. you should follow the helm manual for sure but if you look up the wiring diagram you should get which wire is which. It's really easy if you follow the flow chart...

It should be cool to drive for now, the computer has a backup mode and it will be fine.