There are a few reasons why this may happen: The most common reason is that your car is equipped with an idle stop -start system. This system is designed to save fuel and reduce emissions by automatically shutting off the engine when the car is stopped. Another reason why your car’s engine may shut off when you stop is because of a faulty Not long ago, you'd start your car a few times a day. But with stop-start systems, you're starting it 50 or 100 times a day. So an engine that shakes on restart is suddenly a real annoyance. We hope Subaru figures it out soon -- through better damping or whatever -- because it's an unfortunate demerit on an otherwise very good car. TTAC has long seen stop-start systems (which turn off the engine at idle) as one of the many common-sense technologies that will continue to improve internal combustion engine efficiency at a relatively low cost. Outside of these digital pages, though, the systems have taken longer to gain awareness in the United States, resulting in the lagging adoption rate pictured in the chart above. Up to This company provides Auto-Stop/Start technology to all of the American manufacturers, Audi, Volvo, Fiat, Toyota, Hyundai and Land Rover. This advanced system detects when the vehicle comes to a stop. With sensors telling it that the brake pedal is depressed and the engine RPM has dropped, it knows to kick in. When idle, your car still consumes fuel, around 1.2L per hour for a typical engine (your car might have a smaller engine, so take that into account too). With the start-stop system, your engine turns off when you stop, saving you that fuel. How useful this is depends on how long you will be idle, e.g. stopped at traffic lights, waiting for The Auto Stop/Start feature (Idle Stop/Go or ISG) is one that I suspect will generate a great deal of emotion from various drivers. Some really like it, some really don't like it. I'm not here to argue whether or not this is a good or bad idea, rather the intent is to share information amongst the forum members. awuLC. Once the Jeep’s engine is warmed up and the interior is within a range of set temperature the engine will enable ESS. If ESS is enabled when the Jeep comes to a complete stop and the brake is pushed the engine will automatically shut off, lights, HVAC, radio, and all accessories will remain on. As soon as the brake pedal is released the Start-stop has a break-even point somewhere around 7 seconds. Sounds like a while but pretty much any red light you hit will be longer than 7 seconds. Idling uses more fuel than you expect, to control the engine and keep it from stalling the ignition timing is not near MBT so more air and fuel is needed to achieve the same idle RPM. Used Most of those systems monitor the brake pedal. You can kick the car back on by easing up on the brake pedal to just before the car will start rolling forward. Same technique does wonders on getting dual clutch transmissions to engage from a full stop so there's hardly a hiccup when you hit the gas. 3. ytphantom. I know hybrids and some conventional cars start/stop the engine frequently when engine power isn't needed (but I'm not sure if they turn off a cold, just-started engine), but my conventionally powered 5 yer old car was probably not designed for frequent restarts. the automatic start-stop system is both hated and loved. but does it really wear out engine components like the starter motor faster? let's find out! The auto start stop is a product of the government mandated MPG war in my opinion, it's playing to the test. An automaker like honda, one that I respect for their engine making and one that has a better mpg average across their fleet, doesn't use it. At least, my wife's new accord with a small little 4-cyl doesn't!

is auto start stop bad for engine