[W126 Coupe] Fouled Spark Plug

[Markus Meyer]

You may want to check the #4 injector as well, because a leaking injector
can cause the spark plug to foul.

Markus

On Tue, Sep 21, 2010 at 1:12 PM, Henry Viveiros <henryviv at oigp.net> wrote:


>  The #4 spark plug on my 1991 560 SEC fouls every now and then. I want to

> clean or replace it when I feel the rough idle.

>

>  I currently have W9DCO Bosch Super RO 882 gapped at 0.32. I have seen

> messages saying to use NGK BP6ES set at 0.042 and other suggested gaps

> from 0.032 to 0.055.

>

> What should I do?

>

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>

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