The only thing to plug, when timing an engine that has a distributor,
hence the ability to set timing, is the vacuum advance line, if it has
Some distributors back then were already computer controlled in which
case there is nothing to plug.
"Gary N. Mace" wrote:
It should tell you on the underhood label thats usually on the radiator
support or sometimes on the air cleaner housing. On all the computer
controlled GM cars that I've had to time there is a brown/white stripe
wire that needs to be unplugged. The label will tell you where it is
under the hood.
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