S-Class (W140) 1991-1999: 300 SD, S 350TD, 300 SE 2.8, S280, 300 SE 3.2, 300 SEL 3.2, S320, S320L, 400 SE, S420, 400 SEL, S420L, 500 SE, S500, 500 SEL, S500L, 600 SE, S600, 600 SEL, S600L, 500 SEC, 600 SEC

94 s500 uneven idle

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Old 07-07-2011, 10:20 AM
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94 s500 coupe
94 s500 uneven idle

Anyone know what might be causing a very subtle hiccup in the idle.
It also seems to be sluggish (IMHO) on take off. I've tried adding seafoam
to the gas tank, but so far the problem is still there. Is there a list of things I can check myself to determine where the problem is? If I can
get the idle problem fixed the car will idle as smooth as silk. Lastly, if this is something I can troubleshoot myself is there some test that a repair shop can run to track the problem down? All suggestions are welcome.

Thanks,
T

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