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Old 07-23-2009, 11:47 PM
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Default engine trouble

i have a question my engine star vivrating bad when is in park, if i press the gas and i reach 1400-1500 rpm thats when it happen if go to 1600 rpm it stop
i change the coil, spark plugs, wires, egr valve and is still doing it. what can i do
Old 07-24-2009, 10:43 AM
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Default Scan, scan, scan:

Have the system scanned for a possible trouble code.

(Off the top of my head I'd say the IAC controller was going bad, but any of many things can cause the symptoms you are seeing.)
Old 07-24-2009, 11:40 AM
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Have fuel pressure checked if there are no codes or check engine light, whens last time f/f was replaced?



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