RE: Rich mixture saga, continued...still fouling a plug

["Nick Koleszar" <npk@domain.elided>]

Greg

It doesn't sound like you have a rich mixture, cylinder 3 simply isn't
burning the mixture it's getting.

1. Swap cylinder 3 plug lead with that of a different cylinder (both ends).
Make sure you don't mix them up. If the problem remains at cylinder 3 then
you know it's not the HT lead.

2. Check your distributor cap and rotor arm.

3. Try a compression test to see if cylinder 3 is low.

Checked your oil/water for signs of a failed head gasket?

Checked your valve clearances?

nk

> ------------------------------
>
> Date: Mon, 10 Jun 2002 19:58:45 -0500
> From: "Greg McNair" <gmcnair@domain.elided>
> Subject: Rich mixture saga, continued...still fouling a plug
>
> Well, after installing the proper plugs  (NGK BP7ES), and replacing the 02
> sensor with a brand new bosch unit, she's still misbehaving.  I
> drove about 15
> miles yesterday, and it ran like a top (compared to previous drives), but
> still running rich, with a light, steady amount of black smoke
> coming out of
> the exhaust.  Today, I fired her up, and prepared for another
> short trip, and
> only 3 cylinders were hitting.  I pulled each plug wire in search of the
> offender, and when I pulled #3, there was no change in the engine
> operation.
> I pulled the plug, and it is heavily sooted and fouled.  What
> gives?  I can't
> imagine a single fuel-system related item is to blame at this
> point, as the
> entire system should suffer, should it not?  But I'm all ears, so
> doc, please
> advise...
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