I just fixed my non-working sending unit which was causing the gas guage to malfunction. Since there are a lot of posts regarding this I took pictures and wrote instruction on how I diagnosed and fixed it. I attached it to a link on my web page for all to use. The only thing is that I do not know the wire color coding for the 86/87. I think it is Gray( +12 volts fuel pump), purple
(sending unit signal), and black(ground) If someone can let me know if this is correct I will add it in there.http://www.geocities.com/MotorCity/Street/6853/index.html
(sending unit signal), and black(ground) If someone can let me know if this is correct I will add it in there.http://www.geocities.com/MotorCity/Street/6853/index.html