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Originally Posted by hmong337
Anybody actually pin point absolutely what causes this noise and not just guessing...?
My car has done this since day one.
....getting off the highway, throw it in neutral to coast, "chappa chappa chappa"....
Never owned a car that did this before. It's doesn't happen all the time but it does happen from time to time. My guess is a loose throw out bearing rattling around.
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mine used to do similar and when coasting to a stop and occasional dip with a\c on in summer. zeroed out the port\direct intection ratio tables up to 0.3 engine load as per tune tweaks thread below and not noticed it since. i think it gear backlash as the engine nearly stall the ecu catches it. by running full direct intection at idle and rearly low load ecu appears to be able to catch the dip quicker and its not trying to inject minute amounts of fuel via both injection systems and no noise , smoother idle and takeoff
standard setting is about 30\60, port\direct