Have a 88 w/ an I 6. Clearly over rich. Following a you tube video, telling me to probe the input socket. With the center being neg. I test for reference voltage, getting 4.91 V. Problem is, when I move to the top wire, for output. I get nothing. Despite how much I wiggle the probe/socket. The video is for a AM install, which name escapes me at the moment. Mine is stock. Is that my problem? Thanks for accepting me in the forum.