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Registered
Join Date: Jul 2001
Location: Wilmington, NC USA
Posts: 635
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The electronic injectors do make a clicking sound but I do not think you can hear them from inside the car. Hood up and ear close maybe. The engine has hydraulic lifters so there is no valve adjustment. But if a lifter isn't staying full of oil it could cause a tapping sound. Hope this helps.
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69 911 2.3Ez
85 928S
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