OH, like when you set things in the trunk (like me fixing the 3rd lite
) or more people in the back than normal-----using the pump rarely to air someones tire up out of the rear port etc etc, where I used to hear it run for a few seconds to stabilize the ride height it now runs and runs-----sometimes takes til I get thru with what I am doing and remove the load before it will shut off.
Just seems worn, or no real volume being pumped.
I assume these are just nylon piston types in an aluminum bore-----kinds of pumps?
There are no leaks that I can find, I've been stem to sterm and found nothing, if there were a leak I would expect it to run continuously anyway. I also assume there has to be some type of backflow valve but I haven't spent enough time looking it over, has to be in/near the pump? Not that this would cure the volume issue, but could possibly be restricting?