I have a 2000 F150 Extended Cab 4.2L V-6. On the drivers side firewall is a cylinder and out of the bottom are two vacuum lines. One of them comes from the bottom of a black fluid refill reservoir and runs to under the throttle body. It has collapsed and is making the truck run rough. Is that part of the Smog System? It's on the firewall, almost sitting on the top left of the brake booster and in front of the clutch refill reservoir. any ideas what vacuum line that is? Thanks.

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Asked by Stephan Apr 12, 2018 at 05:24 PM about the 2000 Ford F-150 XL SB

Question type: Maintenance & Repair

I have a 2000 F150 Extended Cab 4.2L V-6. On the drivers side firewall is a
cylinder and out of the bottom are two vacuum lines. One of them comes
from the bottom of a black fluid refill reservoir and runs to under the throttle
body. It has collapsed and is making the truck run rough. Is that part of the
Smog System? It's on the firewall, almost sitting on the top left of the brake
booster and in front of the clutch refill reservoir. any ideas what vacuum line
that is? Thanks.