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About mwood

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  • From
    Alamo, CA
  • Porsche Club
    PCA (Porsche Club of America)
  • Present cars
    2003 Porsche Boxster S
    2007 Shelby Mustang GT
    1966 Sunbeam Tiger
    1988 Van Diemen RF88 Formula Ford
    2007 Lexus RX350
    2007 GMC C2500 Duramax
  • Former cars
    1973 Porsche 911E
    1978 Ferrari 308GTB
    2002 Corvette Z06
    Too many Mustangs to count...
  1. Thanks for all the input and ideas. The idea of the combi valve is something to consider. If the CEL was on, I'd definitely look into it. Actually, I'd like to, anyhow. What's the best way to do so? On another 986 board, it was suggested that the SAI may actually run longer in initial start up in mild temps, in comparison to when it is actually cold. This is due to the fuel mixture the engine sees in the colder start environment, which is richer and leads to more uncombusted fuel mixing with the injected air. This would result in the cats firing sooner. It makes sense, to me, and aligns with what has been happening...this week, the morning temps have been warmer and the SAI has run a little longer. Does that make sense?
  2. First post here, so if I'm doing it wrong, let me know! I'm a new Boxster owner, having purchased a 2003 986 S a month or so ago. It is a 49k mile car, all records, IMS done 1000 miles ago (PO had done just before extended warranty expired, to enhance resale value). I'm really pleased with the car. As for me, I am a decent parts replacer and set up guy (autocross SCCA at National level, currently running a Van Diemen RF88, and also am finishing a bare-metal up restomod on my '66 Sunbeam Tiger), but get pretty lost with modern electronics and emissions systems. I started noticing an electric motor sound on start up recently, which through searching this forum (and others) I've determined is the secondary air injection pump. Seems it is getting that higher pitched noise that indicates bearings are either dry or worn. I have also searched and determined that: 1) a Porsche oem part is very expensive 2) you can get a new Bosch replacement part for around $545 3) they are readily available on ebay, used, for anywhere from $100-300. Sound about right? But, here's the thing...I first noticed the noise last week, when it was lasting approximately 30 seconds or so, before cycling off. Now, this week, while the quality of the noise hasn't changed at all, it seems like it is lasting longer. I don't think it is temperature related, as it lasted just as long when I started up this afternoon, after being parked outside in the sun on a warm day, as it did this morning in the 55 degree garage. In any case, it seems like it is more of a 1 minute plus type deal, now, and I believe it was about half that a few days ago. So, the question: If the SAI is cycling longer, all other factors being equal, what might that indicate? My plan is to remove and clean/lubricate, as much as possible. If that doesn't work, let it die, if that's what it is going to do, and then replace. Not sure if that means a used part...anyone have any experience with buying used pumps? But, before I would replace, I'd like to figure out if the pump motor is going south for some other reason, if that makes sense. Thoughts? Thanks-Mike
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