[V8] V8 surging problem continues

[aukdav]

Thanks Ed, I'll give them a good checking over tommorrow.  I have a new fuel pressure regulator that is coming in so I'll just check them over while installing it.  

Sorry about the repeat posts, For some reason my original messages were not coming through, but it looks like the plug finally came loose. :)

Dave

---------- Original Message ----------------------------------
From: Ed Kellock <ekellock at gmail.com>
Reply-To: Ed Kellock <ekellock at gmail.com>
Date:  Sun, 26 Dec 2004 16:28:21 -0800

>Just off the top of my head....
>
>Vacuum leaks can also cause this.  There are a few common places to
>find vacuum/breather hoses.
>
>Under the air cleaner cover, there is a breather hose that goes from
>one side to the other.  There is another that goes from the back of
>the driver's side valve cover down to the block.  There's another
>small short one at the front of the driver's side valve cover that
>goes down into the abyss.
>
>There is a vacuum line that circles around the intake hole at the back
>of the top of the intake manifold (you have to remove the bottom of
>the air cleaner box to find it.  Just next to its passenger side end,
>there's another vacuum hose that goes to the climate control system. 
>(This is the one that I just found a large tear in last week.)
>
>There's a small one that runs from the fuel pressure regulator to the
>intake manifold.  This is right on top of the intake manifold.  There
>are two more that go from the butterfly plate at the front of the
>engine to the carbon canister.
>
>Some have bought a 4-wire ox sensor and ran the separate external
>ground to the bolt that secures the cruise control diaphram apparatus
>to the back of the top of the engine block.
>
>Remove and clean the connectors for the throttle position sensor. 
>Also check the connections for the intake air temp sensor.  If they
>are soldered, you may consider putting solder gun to each to melt the
>solder and let it recure to refresh the connection.  If they're not
>soldered, then unplug each and clean the connection.
>
>Check to see if the surge is present when the climate control system
>is set to OFF.  There's a way the CC controller can cause a vacuum
>leak too.
>
>Ed
>
>On Thu, 23 Dec 2004 09:00:46 -0500, aukdav <aukdav at mail.ccsdana.net> wrote:
>> Having some teething problems with my recent find.  1990 V8Q  When I picked it up it had moderate surging problem.
>> 
>> A read of archives told me 02 sensor was to blame.  Changed the 02 sensor with the tried and true Bosch generic.  No improvement.
>> 
>> Checked the #5 fuse, it was fine.
>> 
>> Changed the fuel filter, no improvement.
>> 
>> Changed the NTS sensor on the back of the left head.  No improvement.
>> 
>> WOT gives good smiles.
>> 
>> What is the next step?
>> 
>> Thanks,
>> Dave
>> _______________________________________________
>> Audifans V8 mailing list
>> Send posts to: mailto:V8 at audifans.com
>> Manage your list connection: http://www.audifans.com/mailman/listinfo/v8
>> Have an Audi V8 question?  Check the Audifans Knowledgebase!
>> http://www.audi-quattro.org/cgi-bin/twiki/view/Audi/V8
>> Have a V8 answer? ... Please help others by adding to the KB ... all contributions welcome!
>>
>_______________________________________________
>Audifans V8 mailing list
>Send posts to: mailto:V8 at audifans.com
>Manage your list connection: http://www.audifans.com/mailman/listinfo/v8
>Have an Audi V8 question?  Check the Audifans Knowledgebase!
>http://www.audi-quattro.org/cgi-bin/twiki/view/Audi/V8
>Have a V8 answer? ... Please help others by adding to the KB ... all contributions welcome!
>