How do I fix this? I changed the map sesnor and still no good?

 

Try this. I got this info many months ago when I was doin my swap, hope this helps. Sorry to whoever posted this info as I forget who said it, or if it's somone from h-t.

Sensor output voltage range is 0.5 to 4.5 volts.
Output voltages between 0.5 and 1.5 volts indicate a high vacuum (low pressure) situation, such as idle or deceleration.
Output voltages between 1.5 and 3.0 volts indicate a medium level of vacuum (pressure) such as a cruise or slight acceleration condition.
Output voltages between 3.0 and 4.5 volts indicate a low vacuum (high pressure) situation such as hard acceleration or a mechanical failure.
Any reading of 0 volts or over 4.5 volts indicates a problem.
Inspect the rubber nipple (fitting) from the MAP sensor to the throttle body. Repair as necessary. CAUTION: When testing the MAP sensor, be sure that the harness wires are not damaged by the test meter probes. Test the MAP sensor output voltage at the MAP sensor connector terminal B. With the ignition switch ON, and the engine OFF. Output voltage should be 4 to 5 volts. Test the MAP sensor output voltage at the MAP sensor connector terminal B at a hot, neutral idle speed condition. The voltage should drop to 1.5 to 2.1 volts. Test MAP sensor supply voltage at sensor connector terminal C with the ignition ON. The voltage should be approximately 5 volts (±O.5 V

 

could this be a bad O2 sensor?

 

could a bad o2 sensor cause a CEL #3 (map sensor)

my o2 sensor is black. is that bad?

 

It's normal for it to be black/dark. Exhaust accumulates on it, especially if your MAP sensor isn't working. Mine wasn't working after replacement, so I decided to take the tape off the wires and two wires were mixed up. I was lucky that the mistake was before the harness goes into the car.

Check the wires and search for the downloadable version of the repair manual. Section 11 will be your best friend