Rb20det Vac Hose Routing

[floody]

Just wondering where the hose that comes off the firewall end of the fuel rail runs to? Is it vacuum or to the charcoal canister?

[Mark_McQ]

If you have the fuel rail that has a pair of regulators on it, and you're reffering to the small hose that comes off the rear regulator, it's tee'd into the big vacuum pipe that goes into the side of the intake pipe, just before the throttle body.