Brian71583
Newbie
I'm jumping the gun here as I don't even have the truck at my house right now if I were there but I figured I'd ask this question while its on my mind. Recent purchase of a '96 C3500 Crew Cab Dually. It has a few issues I'm working through but the main was is getting the transmission rebuilt so troubleshooting of some issues such as this one have been more mental than physical since driving wasn't possible.
The charcoal canister on this guy makes a pretty audible suction sound constantly. Not right at startup but soon after and once it starts it is constant. It comes from the center port that only appears to have a guard over it. Not sure if its an intake or a vent but its certainly moving an audible amount of air.
I've never heard this before in any of my vehicles from that era. Any ideas? I'm sure the whole EVAP system on this truck is messed up. It appears to have the wrong filler neck on the truck and the filler vent hose is patched in at least 2 places.
The charcoal canister on this guy makes a pretty audible suction sound constantly. Not right at startup but soon after and once it starts it is constant. It comes from the center port that only appears to have a guard over it. Not sure if its an intake or a vent but its certainly moving an audible amount of air.
I've never heard this before in any of my vehicles from that era. Any ideas? I'm sure the whole EVAP system on this truck is messed up. It appears to have the wrong filler neck on the truck and the filler vent hose is patched in at least 2 places.