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Date:         Sat, 17 Feb 2007 15:07:43 -0800
Reply-To:     jon <jon@KENNEKE.COM>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         jon <jon@KENNEKE.COM>
Subject:      Re: The dreaded AFM adjustment screw - PROBLEM SOLVED
Comments: To: Mike Frost <wasserleaker@GMAIL.COM>
In-Reply-To:  <2b9b38180702171403g74972772g2f293a73c3a60e2@mail.gmail.com>
Content-Type: TEXT/PLAIN; charset=US-ASCII

Cool. It's nice it was a "simple" problem. I always like to read the solution to folks' problems, so I can learn.

Ok, experts: why does a leak cause increased HCs? I'd imagine it has to do with decreased backpressure.

I'll file this one away for future reference!

Jon

On Sat, 17 Feb 2007, Mike Frost wrote:

> I found a nice big crack in the exhaust just outside cylinder two. It was > about 1.5 inches long and wrapped almost halfway around the pipe. > > Our emissions test stations close at 1:00PM on Saturday so I had to come up > with a quick and dirty fix to see if I could pass. I picked up a "muffler > bandage" (cringe!) for about $3.00. As per the instructions, I cleaned the > affected area and wrapped it with the bandage, adding the included wire that > holds the thing in place while it is curing. The drive to the test station > was just about the right length to meet the instructions for the bandage. > > I pulled into the emissions place at 12:55PM and ignored the glare from the > guy at the gate. Lo and behold, my HC was down to 125 (was 225) and CO was > down to 0.09% (was 1.5%). So the leak was definitely the root cause. I > managed to avoid opening the AFM for now. > > The crossover pipe will be replaced as soon as I can afford it, I plan to > just swap out the whole system in front of the cat converter since that and > the muffler have been recently replaced. Man, those pipes are expensive! > And, the parts jobber told me they can't get it anymore, he sent me to the > VW dealer. Original parts for the exhaust may be drying up, although I see > that Van Cafe has what I need. > > Thanks once again to everyone who pitched in to help me on this one. > > > Mike Frost > 86 Vanagon GL "WasserLeaker" aka "Completely Exhausting" >


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