I can't determine exactly where your diagnostics are at this point since
there have been so many postings on this subject line.
I want to let you know that I had a rich running van and after much
frustration (tried about everything) I pulled the cover off the AFM and
found the contact on the AFM stuck in a middle position. I just barley
touched it and it returned to the basic idle location.
While in the 1/2 full open position it ran the fuel injectors all the
time at higher delivery and the fuel pump ran all the time.
It exhibited signs of running rich, rough idling and had a raw fuel smell
at the tail pipe. This van was an Air Cooled but you might want to
include this simple investigation in your search.

Stan Wilder

On Thu, 12 Dec 2002 08:53:43 EST George Goff <THX0001@AOL.COM> writes:
> In a message dated 12/11/02 9:36:07 PM, drillock@EARTHLINK.NET
> writes:
>
> << Read the original posts. He already identified a specific
> cylinder with
> a problem. >>
>
> Read the post and you will find that no ONE cylinder has been
> identified as
> lame.  All the plugs were black indicating all four cylinders were
> running
> excessively rich at the start of the troubleshooting session.  He
> then pulls
> the injector plugs one at a time and notes a change for TWO of the
> cylinders.
>  Now, if you want to bet that two injectors or two plug wires became
> hinky at
> the same time and then you are going to identify which it is by
> swapping
> things around, I'll give you some good odds!  I have attached the
> grist of
> the original posting to refresh your memory:
>
> In a message dated 12/10/02 7:42:09 PM, eunrau@YAHOO.CA writes:
>
> << 1) At first engine wouldn�t start.  Flooding?  Pulled the plugs
> - they
>
> are BLACK.  Changed the plugs, rotor & cap (overdue anyway)
>
>
> 2) Engine starts.  Runs rough.  Exhaust smells like fuel.
>
>
> 3) Plenty of exhaust pressure at the tailpipe.  Does this rule out
> a
>
> plugged cat?
>
>
> 4) unplugged the O2 sensor - no change - still rich and rough
>
>
> 5) Maybe a bad injector?  Decided I'd unplug injector wires one at
> a
>
> time to see what would happen:
>
> Unplug wires at cylinder #3 - idles much rougher, plug back in
>
> Unplug wires at cylinder #4 - no change to idle, plug back in
>
> Unplug wires at cylinder #1 - idles much rougher, plug back in
>
> Unplug wires at cylinder #2 - no change to idle, plug back in
>
> Does this mean that injectors #2 & #4 have failed???>>
>
>
> George
>
>
>

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