Re: Evaporator Canister Question
My understanding is slightly different---I was under the impression that at idle , there is no ported vacuum signal to the CTO valve . Therefore, there is no purge signal reaching the Evap Cannister from the CTO. Hence , even at idle , with steady manifold vac reaching to the Evap Cannister along the main evap cann hose line, the evap Cannister will not allow the vac from manifold vac to pull vapors from evap cann to the intake manifold . Once the engine is revved and ported vac appears above the throttle plate, then the ported vac signal is passed from the carb port to the CTO , and then it is passed to the Evap Cann Purge Signal Port . This then permits the ongoing manifold vac to pull vapors through from the Evap Cann to the intake manifold . Does this sound correct ?