If the 'box' (the TCSA solenoid) is working as it was originally designed
there is no need to disconnect the pipe and plug the port, precisely
*because* the box is doing that anyway, by only connecting vacuum through in
4th gear.
PaulH.
----- Original Message -----
> Thomas, the procedure (as I understand it) is to disconnect the vacuum
> pipe from the distributor (and plug the pipe), then set the timing (I
> thought it was 15 degrees BTDC, but maybe 11 or 12 is good), then
> reconnect the pipe. The box that the pipe connects through is a switch
> that only allows the vacuum spark advance to work in 4th gear...
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