Could really use some help

[gc73]

The CEL light does come on with the key and go out when it is running. I know when I unplugged my IAT the CEL Light would come one. I have also jacked around with the NAG switch behind the speaker on driver side. when you slide it 1 way the CEL light is always on and the other direction CEL is off (until unplug IAT sensor). It may be in limphome mod but how do you know?

It is an 8V I believe. and i checked out the MAP sensor and the line to it seems good with no cracks and has good vac. I have not cleaned the nipple. what is the best procedure to do that?

Thanks for the help!!