[W126 Coupe] Fouled Spark Plug

[Attila]

                Hey Markus.  I recently ordered a set of W9DC plugs.  When
they arrived, the

                box said W9DC, but inside were WR9DC plugs.  Is it still
possible to get W9DC

                or have we hit the end of the road, which is what I was told
by my supplier. 

                Can the resistors be removed from the spark-plug wires, or
are they in the

distributor cap?  

 

From: mbcoupes-bounces at mbcoupes.com [mailto:mbcoupes-bounces at mbcoupes.com]
On Behalf Of Markus Meyer
Sent: Tuesday, September 21, 2010 1:23 PM
To: Mercedes Coupes Mailing Lists
Subject: Re: [W126 Coupe] Fouled Spark Plug

 

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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