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  2. Engine knocking - Wikipedia

    en.wikipedia.org/wiki/Engine_knocking

    In spark-ignition internal combustion engines, knocking (also knock, detonation, spark knock, pinging or pinking) occurs when combustion of some of the air/fuel mixture in the cylinder does not result from propagation of the flame front ignited by the spark plug, but when one or more pockets of air/fuel mixture explode outside the envelope of the normal combustion front.

  3. Back-fire - Wikipedia

    en.wikipedia.org/wiki/Back-fire

    This causes an incomplete burn which causes the fumes to explode in the exhaust system along with an audible pop or bang sound. This is a result of working equipment, and is unlikely to cause damage. A fuel-injected engine may backfire if an intake leak is present (causing the engine to run lean), or a fuel injection component such as an air ...

  4. Ignition timing - Wikipedia

    en.wikipedia.org/wiki/Ignition_timing

    Pressure in cylinder pattern in dependence on ignition timing: (a) - misfire, (b) too soon, (c) optimal, (d) too late. In a spark ignition internal combustion engine, ignition timing is the timing, relative to the current piston position and crankshaft angle, of the release of a spark in the combustion chamber near the end of the compression stroke.

  5. Ignition coil - Wikipedia

    en.wikipedia.org/wiki/Ignition_coil

    An ignition coil is used in the ignition system of a spark-ignition engine to transform the battery voltage to the much higher voltages required to operate the spark plug(s). The spark plugs then use this burst of high-voltage electricity to ignite the air-fuel mixture. The ignition coil is constructed of two sets of coils wound around an iron ...

  6. SUV slams into Portland home causing fiery explosion with ...

    www.aol.com/news/suv-slams-portland-home-causing...

    An SUV slammed into a Portland home on Christmas Eve, igniting a massive blaze at a property that has been the scene of nearly 30 car accidents over the last decades according to neighbors, with ...

  7. Another 1 million not deported because Biden granted ...

    www.aol.com/news/another-1-million-not-deported...

    (The Center Square) – After millions of illegal foreign nationals were released into the country through new parole programs created by the Biden administration, at least one million were ...

  8. 'Strong candidate': Elizabeth Warren signals she could ... - AOL

    www.aol.com/strong-candidate-elizabeth-warren...

    WASHINGTON — Sen. Elizabeth Warren, D-Mass., signaled that she may back Rep. Lori Chavez-DeRemer, R-Ore., for labor secretary, a major progressive figure being willing to work with President ...

  9. Firing order - Wikipedia

    en.wikipedia.org/wiki/Firing_order

    For this inline-4 engine, 1-3-4-2 could be a valid firing order.. The firing order of an internal combustion engine is the sequence of ignition for the cylinders.. In a spark ignition (e.g. gasoline/petrol) engine, the firing order corresponds to the order in which the spark plugs are operated.