I did some searches on the football without any luck on what I heard this weekend... '93 XJ
After driving in the rain, shut down back in the garage, I heard what sounded like hissing under the battery, found the canister, moved it a little back and forth and the hissing abruptly stopped.
I am not having any noticeable heater air flow problems, but occasionally I do hear the trap door open, or close, for no reason. Is it normal for the canister to make that noise when it's wet? Is that a sign that it needs to be replaced?
After driving in the rain, shut down back in the garage, I heard what sounded like hissing under the battery, found the canister, moved it a little back and forth and the hissing abruptly stopped.
I am not having any noticeable heater air flow problems, but occasionally I do hear the trap door open, or close, for no reason. Is it normal for the canister to make that noise when it's wet? Is that a sign that it needs to be replaced?