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  2. Idle air control actuator - Wikipedia

    en.wikipedia.org/wiki/Idle_air_control_actuator

    Although the IAC is supposed to last the vehicle's lifetime, various reasons may cause it to fail/malfunction prematurely. The most common failure mode is partial/complete jamming of the actuator (due to dirt/dust or even oil) where it cannot be smoothly controlled. The result is an engine that fails to maintain idle RPM and frequently stalls.

  3. Engine knocking - Wikipedia

    en.wikipedia.org/wiki/Engine_knocking

    This sudden increase in pressure and temperature causes the distinctive diesel 'knock' or 'clatter', some of which must be allowed for in the engine design. [ citation needed ] Careful design of the injector pump, fuel injector, combustion chamber, piston crown and cylinder head can reduce knocking greatly, and modern engines using electronic ...

  4. Crankshaft position sensor - Wikipedia

    en.wikipedia.org/wiki/Crankshaft_position_sensor

    A bad crank position sensor can worsen the way the engine idles, or the acceleration behaviour. If the engine is revved up with a bad or faulty sensor, it may cause misfiring, motor vibration or backfires. Acceleration might be hesitant, and abnormal shaking during engine idle might occur. In the worst case, the car may not start.

  5. 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.

  6. Pre-ignition - Wikipedia

    en.wikipedia.org/wiki/Pre-ignition

    Carbon deposits form a heat barrier and can be a contributing factor to pre-ignition. Other causes include: An overheated spark plug (too hot a heat range for the application). Glowing carbon deposits on a hot exhaust valve (which may mean the valve is running too hot because of poor seating, a weak valve spring or insufficient valve lash)

  7. Shirtless Hugh Jackman Goes Full Wolverine with Chest Hair ...

    www.aol.com/shirtless-hugh-jackman-goes-full...

    Hugh Jackman is showing off his Wolverine physique.. The actor, 56, enjoyed a day in the sun on Bondi Beach in his native Australia on Monday, Dec. 16. Jackman took a dip in the ocean wearing a ...

  8. Notre Dame Quarterback Couldn't Wait to Find His Girlfriend ...

    www.aol.com/lifestyle/notre-dame-quarterback...

    Notre Dame quarterback Riley Leonard raised the bar on boyfriend goals after his team's Orange Bowl win on Jan. 9. During a postgame interview with SiriusXM's Alyssa Lang, Leonard, 22, said he was ...

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