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Date:         Wed, 10 Aug 2011 09:36:29 -0400
Reply-To:     Joel <joel_cort@YAHOO.COM>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Joel <joel_cort@YAHOO.COM>
Subject:      Re: Help! Hesitation on the road!
Comments: To: T Collins <tonycollin@GMAIL.COM>
In-Reply-To:  <CAAzKkH_LBybQ9GWSpp73nVx-oqvunW1uRhaE0ohCCHmcrqBkfQ@mail.gmail.com>
Content-Type: text/plain; charset=us-ascii

It is your exhaust leak and system.

sent from my iPhone Joel

On Aug 10, 2011, at 8:30 AM, T Collins <tonycollin@GMAIL.COM> wrote:

> Hi Daniel, > > I like to share with you what my 85 did. I would cruse at high way speeds > 70mph here in Michigan. The van would sort of hiccup, tremble, hesitate and > something just did not feel right. It was like the van wanted to quite at > mid flight. > > It was just enough of a feeling that lasted a split second to make me > worried that this was the dreaded vanagon syndrome. I also had a exhaust > leak at the time. So I was certain that the leak pre O2 sensor had something > to do with this. > > I fixed what I knew was certainly wrong. New exhaust, O2 and temp2 sensors, > replaced fuel filter the (box one) and added the can after the fuel pump. > Some of this helped, but at the end the van got so bad that I could start it > and it would idle, but as soon as any load was applied the van would bog > down and die. > > I also messed with the AFM getting a know working one to swap in and test > and still noting!!! > > long story short and with me absolutely frustrated i dropped it off at the

> local VW independent shop. The old salty-dog mechanic there blew some air > into the (slow, steady stream) into the outlet (fuel pump side) of the tank, > until he could hear bubbles. Then plugged everything ups and the van has > been running great for 2 years now. > > There was accumulated crud in the gas tank blocking the delivery of fuel to > the pump starving it. These happened slowly at first the hesitation at > highway speeds, and then later magnified by the van sitting while I tackled > the exhaust. > > The key I should have been listening for was that the pump was being > extraordinarily load and working overtime to get any fuel. I'm amazed in > retrospect that I did not burn it out. > > The fuel delivery can be a simple thing to assess before moving to the spark > and air area of things. If your pump is load it maybe worth checking, and > seeing if some compress air with a low or partially drained fuel tank makes > a difference to your situation. > > The caveat is that there is no way of knowing how much crap build up we have > in our old tanks until we take then out and inspect. Not a job I want to do > on the side of the road. > > I hope this helps! I keep recalling to try and see the issues from the > simplest to the largest , before just tossing money at it and replacing > parts that are potentially good. > > Good luck, > Tony > > On Mon, Aug 8, 2011 at 6:27 PM, Daniel Rotblatt <d.rotblatt@verizon.net>wrote: > >> I'm leaving Sante Fe on the return leg to L.A. The van is hesitating >> while on freeway. Momentary hesitations - randomly every few seconds. >> >> Otherwise running great. When I had it tuned up it had trouble >> starting and mechanic put in new fuel pump relay. >> >> Thoughts? Just pit in gas also...was running fine before that. Bad >> gas? Fuel pump? >> >> Dan >> '85 Vanagon >> >> Sent from my iPhone >> > > > > -- > 82 Scirocco "Rodolfo" > 85 Vanagon "El Guapo" > http://groups.google.com/group/wash-co-vws2<http://groups.google.com/group/wash-co-vws2?lnk=gcimh> > (new)


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