I have a 93 F150
For the continuous codes I get

179 Rich HO2 sensor
327 EGR feed back signal low
334 EVP sensor high
634 Neutral/park position switch

For the running test.
All I get is a code 632-Transmission control switch needs to be cycled. I pressed the brake after the ID code and I still get the code.

The reason I am checking codes is for a high idle.
I have sprayed carb cleaner and water around all vacuum lines and gaskets with no change in the idle.

I checked the TPS and EVP sensor, and they both checked out.

Now for the questions.
1. How do I get around the code 632 to do the running test?
2. Any other suggestions about the high idle.

This weekend I will swap out the egr valve with a known good one, clear the codes and check them again, and possibly swap out the Ho2 sensor.

3. What else would cause these codes?
4. Is there a way to adjust the N/P sensor and what happens if it completly goes out?

 

maybe your O2 sensor has gone bad? as far as the idle, do you have any vaccum leaks? sorry i couldnt be of much help.