E-Class (W124) 1984-1995: E 260, E 300, E 320, E 420, E 500 (Includes CE, T, TD models)

Lumpy Idle after tune up

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Old 06-25-2017, 05:15 PM
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E350 wagon
Lumpy Idle after tune up

Hi all,

So i just did a bit of a tune up.

cleaned up the throttle body and the resonance valve.

did the coils, wires, and plugs

coils and wires were mercedes and i switched to buemi and Karlyn wires

plugs were FR8DC+ and I switched to F8DC4.

there was a slight lumpy idle before and now it's much more pronounced.

any ideas?

oh - and the PO stripped out the cover bolts . . . .

thanks,
dave

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