Audi A8 This full sized Audi A8 sedan offers interior luxury and spaciousness comparable to any car in the full sized luxury sedan class

Seafoam an A8

Old 07-06-2010, 11:20 PM
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Join Date: Apr 2009
Posts: 14
Default Seafoam an A8

Hello again everyone,
I am trying to Seafoam my 1999 A8 4.2L. I have searched and searched but have found no info on how to perform the intake cleaning on this car. I took my best guess, and unplugged the vacuum line running to the fuel pressure regulator. I then sucked the Seafoam into that, about 1/3 of a can. I saw no smoke, so I stopped. I let the car sit for 20 minutes, started it, and still no smoke. I don't think this was the right place to do it. I've attached a picture to show the location of where I sucked in the Seafoam...the green straw is the line i used. Can anyone tell me the correct location or verify that this was wrong, or right?

Thanks so much.
Attached Thumbnails Seafoam an A8-dsc02357.jpg  
Old 07-07-2010, 09:02 AM
1st Gear
Join Date: May 2010
Posts: 20

see if you can find the brake booster line,thats where you would get the best results.imho
Old 07-07-2010, 09:11 AM
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Join Date: Apr 2009
Posts: 14

do you have any guidance as to the general area to find the brake booster line? I haven't searched for it yet, and my knowledge of engines is limited at best. Thanks for your help.
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