| [GMCnet] jc4 pump weirdness [message #127846] |
Sat, 28 May 2011 20:26  |
KB
Messages: 1262
Registered: September 2009
Karma:
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Senior Member |
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I recently installed a JC4 vac pump to provide braking in case the
engine dies while driving. I confess, I haven't actually driven with it
yet. I tested my installation with the key on and the engine off and
the pump came on after its 5-second delay as expected, then shuts off.
The weird thing is it keeps cycling on briefly about every 15 seconds or so.
Is this normal, or an indication of a vacuum leak? I'd read that the boosters
do leak, so maybe that's it??
thanks,
Karen
1973 23'
1975 26'
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Karen
1975 26'
San Jose, CA
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