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There is a vac hose off somewhere in the front of the engine. I have not read "check fuel evap hose" yet.
Get a cigar and have someone blow smoke blow in the brake booster or evap hose. have the inspection mirror and light ready. I have used a collapsable camping water jug and filled it with cigar smoke and had my son sqeeze it. he didnt start smoking cigars until he was 10.
go through the parts break down and physically I.D. every AL Y tube, rubber hose and control valve. The Aux Air valve circuit hoses anD tubes are huge for some reason. it is acts like a Idle control vave. i had 4 in vacuum brake booster hose fail inside the tunnel next to the gas pedal.
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1980 911SC, Guard Red. RoW 13…early series
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