A bad timing belt is most likely the culprit when the engine timing is off. A timing belt is a belt that runs between the crankshaft pulley and the camshaft pulley. It is used to synchronize the engine's valves. This causes the engine to run at the correct time and with the correct timing. The engine timing belt is a vital component of the
Sometimes the engine will start but will idle really badly and may cut out. Cause 2. Bad spark plugs. Worn out or dirty spark plugs are also a common reason why a car cranks but won’t start sometimes. Simply checking if a spark plug is generating a spark is not enough when it comes to modern fuel injected engines.
When your car engine runs as it should, everything should be smooth without any noise. When something thing goes wrong, the engine can start running rough, especially while idling. By understanding the causes of a car engine that has a rough idle, you can resolve the issue easily. Here are ten of the most common causes of a rough engine idle. Frequent start-stop will definitely have a negative impact on the engine. During starting the combustion process inside the engine is not in its optimum state hence the amount of soot is higer than normal and if the starting process occurs frequently then there can be higer amounts of deposits in the exhaust passages and turbocharger. Most people think the amount of fuel saved using a start-stop system is negligible, but in reality, that fuel burned while idling at a stop adds up quickly. A study by the Society of Automotive Engineers found that using start-stop can see a car's fuel economy improve by over eight percent in heavy traffic.Sep 5, 2018 Many nicer cars with start/stop are mild hybrids which run the AC off a battery (which keeps running when the engine stops). Obviously full hybrids can also run the AC off the battery. more reply. PlaneCandy. • 3 yr. ago. One of the beauties of EVs is the ability to run the a/c when the rest of the car is "off".
However, bad alternator, clogged fuel filter, broken starter, blown fuse, empty gas tank, immobilizer error, or any fault in the electrical system can also cause your vehicle not to start. 1. Weak Battery. If your Malibu’s engine won’t crank or cranks very slowly, then the most likely culprit is a weak or dead 12v battery.
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    • is start stop bad for engine