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san rensho · 12-28-2013, 08:19 AM

Ok, so I'm making some progress. I pinched off the evap system hose that connects at the throttle body and the MAF values went up to normal, around 13-14 kg/hr, and the fuel trims came down to around 2-3,so it seems the vacuum leak is in the evap system. So which valve should I replace, the shut off valve at the fuel filler or the valve under the left side of the intake manifold? And if it's the valve under the intake manifold, is there a write up on how to do it?

I have had two codes, major leak at the fuel tank ventilation system and PO466, canister shut off valve failure.

12-28-2013, 08:19 AM	#10
san rensho Registered User Join Date: May 2011 Location: Miami florida Posts: 1,591	Ok, so I'm making some progress. I pinched off the evap system hose that connects at the throttle body and the MAF values went up to normal, around 13-14 kg/hr, and the fuel trims came down to around 2-3,so it seems the vacuum leak is in the evap system. So which valve should I replace, the shut off valve at the fuel filler or the valve under the left side of the intake manifold? And if it's the valve under the intake manifold, is there a write up on how to do it? I have had two codes, major leak at the fuel tank ventilation system and PO466, canister shut off valve failure. __________________ Current car 2000 Boxster 2.7l red/black Previous cars 1973 Opel Manta 1969(?) Fiat 850 Convertible 1979 Lancia Beta Coupe 1981 Alfa Romeo GTV 6 1985 Alfa Romeo Graduate 1985 Porsche 944 1989 Porsche 944 1981 Triumph TR7 1989 (?) Alfa Romeo Milano 1993 Saab 9000 Last edited by san rensho; 12-28-2013 at 08:30 AM.