Bill Spangler Posted September 3, 2020 Report Share Posted September 3, 2020 1985 Seville with HT4100. I'm working on tuning up my Caddy, and would like to check the timing. The emissions sticker under the hood says to disconnect a green reference wire 'behind the distributor'. I've spent a lot of time searching but still can't locate that wire. Could anyone point me in the right direction? Thanks. Quote Link to comment Share on other sites More sharing options...
CampoCougar Posted September 14, 2020 Report Share Posted September 14, 2020 I am thinking this a timing advance wire, that when disconnected, returns the timing to base fixed timing. Adjustment is made from that point. Ford has a similar system in the 90s that you grounded to get to fixed timing. I would think the wire itself is coming from the ignition module or distributor area. Quote Link to comment Share on other sites More sharing options...
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