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It's easier said than done. On the 2001 S the vacuum originates at a check-valve on one of the four rubber junctions downstream of the throttle body. From there it ends up at 3 change over valves and the vacuum tank. One of these change over valves lives under the passenger side intake manifold which I'm in the process of removing, the other two were easily accessible. Thanks for the tip RFM, I'd already figured this out but having it written down is good for anyone who might stumble upon this thread in the future. Fortunately driving this baby is enough fun that dealing with the confined space work is well worth it.
Every time I dive into the engine bay I am greeted by that sickening snap sound of one those tiny (maybe 1.5mm ID) vacuum lines or the 3 or 4 way fittings cracking. Well, maybe not EVERY time, but often enough that I'd like to replace them all with nice traditional 3/8" rubber vacuum hose. Can anyone think of a reason this would be a bad idea? Thanks -michael
My 2001 Boxster S has had a rough idle when cold since I purchased it with 89kmiles, it now has 95kmiles and the same problem. After the car had been sitting overnight in a cold (37F, ~3C) garage I turned on the ignition without turning the engine on and configured the Durametric software to read out several temperature values: 12C -- intake air temp 4.5C -- engine temp 3.8C -- oil temp Could my issue be with a faulty intake air temp? If so, what sensor produces this value? The MAF maybe? I have the Bentley (sp?) book and an admitedly quick scan didn't reveal a temperature sensor in the air intake. Any and all ideas are appreciated. -michael