Q: What Is Pre-Ignition? Ans: pre-ignition happens when the air and fuel mixture in the cylinder of an engine is ignited before the spark plug fires. This is typically caused from a hot spot in the compression chamber or by a spark plug that is too hot. Often called dieseling, the engine can run on after the key is turned off and if allowed to continue, can cause catastrophic engine failure. Many high-compression racing engines suffer from pre-ignition. The fuel enters the engine and is ignited early by the heat generated from the ultra-high compression pressures, much like a diesel engine. This often causes the engine to break pistons or bend connecting rods as the other cylinders attempt to fire in the correct timing sequence. The best-case scenario will result in engine knocking or pinging.
Posted on: Wed, 07 Aug 2013 14:18:37 +0000
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