Auto Parts and Repairs
Fuel and Engines
Geo Metro
Late Model 1979-New Ford Mustangs

Why would your 1996 Geo Metro have a rough idle and tapping noise?


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Wiki User
2004-10-28 21:54:13
2004-10-28 21:54:13

have the Fuel injectors checked out.


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can you elaborate? engine noise? stationary/moving? ticking, tapping or a definite knocking?

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Unless you can replicate the engine noise with throttle manipualtion by varying engine speed to 1200 to 1800 rpm, you have a driveline noise

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A tapping noise is generally the result of a bad hydraulic lifter, plugged oil passage to the lifter, or bad tappets. Sometimes just changing to lower viscosity high detergent oil will cure it. Or "Any automotive oil additive with the word MIRACLE in it".

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Engine noise (tapping) than Rap and finally engine seizure

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Possibly warped brake rotor/worn brake pads. Get this checked out.

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