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2003 Mercedes-Benz S55 AMG Question: Some rough idle in park/ start up



mlcooper411, Columbia, SC, February 27, 2012, 10:38

I have a bit of rough idle at start up. I have placed new plugs (Bosch Iridium) car runs fine once it warms up. I have put in cleaner additive, but still rough idle at start up for about 5-mins before it seems to get better. One suggestion was fuel pump sensor???? No diag codes???
Thanks for your time!

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  • Answer #1

    February 28, 2012, 05:17

    There are some causes of rough idling. You can visit here to see the detailing instruction
    There tells car rough idle causes and how to fix it clearly. So I'm not repeat here.

    Good luck and best regards.

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