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Roger Floydman

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Posts posted by Roger Floydman

    Weak Battery on Hot Start

    in 997-1 Series (Carrera, Carrera 4, Carrera 2S, Carrera 4S)

    Posted

    2 minutes ago, JFP in PA said:

    To follow up on what Ahsai has outlined, you need to:

     

    1. Load test the battery
    2. Voltage and load test the alternator
    3. Check the voltage drop across the primary battery cables
    4. You should have a 40-60 mA draw on the battery for about 1 hour or so after the car is shut off.  Any more than that and you have a parasitic drain on the system.

    Lesson to be learned: Do not assume anything when it comes to diagnostics, even at the dealer.  You should have gotten a detailed break down of what they tested and what they found.  We regularly see cars that were just at the dealers, and they completely missed an obvious problem that I would expect an intern to catch.

    Thanks all for the replies. I'll be heading back to the dealer.

    Weak Battery on Hot Start

    in 997-1 Series (Carrera, Carrera 4, Carrera 2S, Carrera 4S)

    Posted

    My daily driver is a 2006 997.1 2S and i have also been having battery issues. Initially (6 months back) i had replaced the battery with a  EverStart MAXX 94R and thought the problem had gone away, but it started to get worse again. Warm starts very weak. Ended up buying a battery tender which is a pain as i live in a place without an electrical socket close to my car. So i took it into the dealer and they said the alternator was good & the battery was shot and i needed a new battery. I was surprised but hey, they are the pros right? So replaced battery with recommended Porsche battery and problem comes back soon after.

     

    Dealer said that i don't drive the car enough ( i'm doing about 10 miles a day, mostly in traffic, max 20-30 mph ) but i find that hard to believe as i have driven many other cars over the years, most no where near as expensive as a 911 and none had similar battery issues.

     

    The dealer did not mention anything about the TSB about the cables mentioned here. I'm assuming they checked the voltages as they charged enough for diag. labor costs.

     

    Any advise appreciated.

     

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