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What is Direct Injection?

The slight tick or ticking you hear is the new Direct Injection in the new Acura's.  A while ago, an engineer with extensive racing experience stated that his engines were designed and manufactured to purr and run like a sewing machine, smoothly.  So what the heck is up with this ticking sound?

Nothing to worry about, it is actually a good thing to hear.  As a matter of fact, it's a GREAT thing…
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