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Stock JK TechBulletin board forum regarding issues with OE (original equipment) components of the Jeep JK Wrangler (Rubicon, Sahara, Unlimited and X) such as factory suspension parts, engine, transmission, body parts, interior fixtures and the on-board computer.
It is my understanding that a lot of the ticking you hear at idle is simply the fuel injectors opening and closing, and is normal. These things have noisy injectors.