Quote:
Originally Posted by kerry
My memory is sketchy, but I think we had a thread on this topic a few months ago. On the 123's I think the glow plugs continues glowing until the timer shuts it off.
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In the original configuration, releasing the ignition switch from the start position should end the cycle. My guess is that the OP purchased one of the aftermarket Bosch "afterglow" timers, which is designed to operate the glow plugs for about three minutes following start.
The afterglow relay, however, doesn't run for three minutes if there is no start attempt. In all probablity, blocking the "start" signal would substantially shorten the cycle.