Tank Pressure Control Valve (Spectrum)
Disconnect hoses from tank pressure control valve located next to charcoal canister. Apply 7.5-8.5 in. Hg to port "A" and blow air into inlet port "B" to ensure valve is open. See Fig 1 . With port "C" capped, lightly blow into port "B" to ensure air will not flow. If valve does not follow specifications, replace valve.