Eric here is a link to the AFC fuel injection manual on your air cooled Vanagon http://www.thesamba.com/vw/archives/manuals/afc_fi_training_troubleshooting_manual/AFC_FI_Training_Troubleshooting_Manual.pdf There's not much to these old fi systems. You should be able to figure it out with an ohm-meter, voltmeter/test light, and a timing light. I have the later digifant fuel injection on my 87. Good luck, Nathan