auto stop going away?

Discussion in 'Fred's House of Pancakes' started by Stevewoods, Feb 21, 2026.

  1. Leadfoot J. McCoalroller

    Leadfoot J. McCoalroller Senior Member

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    They recently launched a 3.3L turbocharged inline 6 in their biggest SUV. I don't know how it's pinned. Not clear whether the bang start was being developed for this or the older 2.5L 4-cylinder or both.
     
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  2. Trollbait

    Trollbait It's a D&D thing

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    What I recall from the last time I read about it.
    1. Computer picks a cylinder that is near top dead center in approach.
    2. The DI fires in some gas that gets ignited.
    3. This drives the crankshaft in reverse.
    4. The first cylinder to reach enough compression is fired. This happens within one backwards engine revolution.
    5. That cylinder is fired to start normal operation.
    I want to say Mazda was calling this system KISS, but my brain is fuzzy.
     
  3. Isaac Zachary

    Isaac Zachary Senior Member

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    Start-stop makes a lot of sense if you're the kind of person who drives with your windows down. It's always nice coming up to a stop and being able to hear the birds instead of bpbpbpbpbpbpbppbpbpbpbppbpbpbppbpbpbpbpbpbppbpbpbpbpbpbpbpbp.
     
  4. futurist

    futurist Member

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    Strange to borrow a friend's car... and wonder once/twice why the ICE's still on at a stop :p

    This 5G's detonated prol ly half of my expectations of driving and owning a cager road vehicle. Even a sportbike idles its ICE at a light... and with the old carbureted SV commuter with an Akropovic full-exhaust and proper jetting... was rather a nice 90-deg V-Twin soundtrack I almost miss...

    More a humblebrag to hear the saucer sound and feel zero vibration... whilst some teen in a 6-yo Sonata with a power-robbing-but-hella-obnox cat-back, Bronx-cheers away way-over-rich emissions next to me... only to crawl away from a light, to get 27 mpg :D
     
  5. Isaac Zachary

    Isaac Zachary Senior Member

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    Sometimes I like to sit in the car and listen to the radio as my wife shops for cloths. Unless it's cold I usually have my windows down (but I play the radio quietly or use earphones/headphones). But next thing you know, someone else listening to their radio pulls up and just idles filling my car up with their exhaust.
     
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  6. John321

    John321 Senior Member

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    One of our cars has the ISG or stop/start system - it actually works smoothly and does a good job.

    ..think it is kind of neat that if you are at a stop it will shut down and start up the engine right away as necessary it saves gas and cuts pollution - it hasn't bothered me a bit in the 7 years we've owned it.

    The manufacturer say the starter and battery are built for this continual start/stop cycle and that myths that they will fail because of more use is horse sh_ _ (of course the manufacturer puts it in different wording).

    we've had no issues and like contributing to less pollution even if it is in a small way - recently replaced the battery after 7 years use which I think is pretty normal - the starter has never had an issue nor has the engine.

     
    #26 John321, Jun 15, 2026 at 6:08 PM
    Last edited: Jun 15, 2026 at 6:22 PM
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  7. futurist

    futurist Member

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    The standard practice (even for domestic cars) in early '90s was to spec powertrain components 60%-over duty cycle (meaning, can handle use cases 60% more than the baseline duty expected for the parts). No idea what it is now... but nice person systems are defo failing (peruse any Stellantis forum). Tbh I don't think it's due entirely to substandard engineering of parts -- but heavily-cut R&D time, to minimal standards.

    Perhaps your Kia is just properly maintained and driven in non-HD conditions (like rush hour traffic jams in Phoenix or SoCal summers). If so, would behoove other H/K owners to try to do the same, if they live in similar conditions -- 7 yrs from a 12V battery is pretty damned good, esp if non-lithium / AGM. When bean counters at H/K aren't trying to shave content from that particular system (lots of conjecture they are with EVs esp), then more likely vs. domestic brands to be R&D'd, engineered & spec'd correctly for the average buyer's use cases.

    M-B, Audi, and BMW also have nice person systems with plenty of complaints, but are in a class of automobile where you'd think they'd be the best-performing ones. Nope -- pretty hard, especially on a vehicle with high bhp/liter (all of them), turbochargers, and / or high-strung semi-auto transmissions.