I just replaced a pretty bad battery. It had been leaking a bit of
acid. A small amount dripped onto a very small diameter vacuum line
that runs under the battery and connects to a silver can. It is not the
chacoal canister which is located elsewhere and its about 1/3 that size.
The other end of the line runs up underneath the air cleaner
somewhere. The battery acid ate a hole in the line. I do not notice
any problems, everything works, engine runs fine and no engine light to
indicate a code. Guess I could splice it or run a new line but was
curious what this line might be.
Cruise control. The vacuum line provides, well, vacuum, that is regulated
by a solenoid valve to the canister. The canister, via a diaphragm,
operates the throttle cable and modulates the throttle. With a hole in that
vacuum line, you'll find that your cruise control doesn't work, your
defroster may flip down to the floor vents on hard acceleration, and your
4x4 (if applicable) may not want to engage.
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