I don't know, would that sound random? when I count it out it sounds like 1....2345...6 7 8 91011 (closer numbers are faster ticks). Do the injectors get louder under load? It doesn't happen just idling or before the engine is warmed up, when I leave my parking garage in the morning it isn't happening, when I pull into the garage at work it is loud and clear. It almost sounds like something is moving and hitting somethings else.
I am getting a daily driver next weekend so I can afford to not have the car if a dealer needs to keep it. The service guy at Park Cities pretty much dismissed it. He said he had another mustang come in and do the same thing. They tore the engine down and couldn't figure out what it was. I think if it were normal most people would have it.
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