I need some clues to shy my trunk lid occasionally pops open. First sign of
a problem was after car was shipped from California to New York last
December. Shipper reported that trunk lid popped open while it was on the
truck. When I got it, noe of the pneumatic items worked any more. Locks,
trunk lid, headlamp washers. Diagnosis was failed PSE pump. Replaced this,
and got it version coded, and all work, but trunk lid still pops open
sometimes. I guess this will ultimately lead to the pump burning out again
at cost of $500.
One clue is that after fast driving, when I come to a quick stop, it pops.
Other times, when I slam the door shut, you can hear the pump actuate and it
pops. Is this an atmospheric pressure thing. Is there a setting for
internal air pressure in the car that makes NY different from CA. The
weather sure is different. When you slam the door you do create a momentary
pulse of air pressure in the car, but why would the pump electrically
actuate? The garage said it might be coffee residue down in the trunk
release switch in the console. Seemed unlikely, but don;t know.
Give me any ideas you have.