So the EFIE I bought was fine, and I installed it correctly. Yet, like I said in another post- the LEDs would not come on correctly. The Activity LED is supposed to light up after 30 seconds and turn off when the engine is under load. All the lights came on. It did lean out my engine. Its just that when I needed power I did not have any.
So the issue is with my car it seems. And its been having a few issues anyway. Between surging or an occasional drop in power when accelerating. And the problem cannot be pinpointed.
Are there any common issues found with cars where the EFIE does not work properly like that? My o2 sensors are new.
I'm trying to learn how the EFIE shuts itself on and off in certain situations. Seems there is a threshold voltage from what I read.