Date:         Tue, 7 Sep 2004 19:58:56 -0500
Reply-To:     Larry Alofs <lalofs@RCN.COM>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Larry Alofs <lalofs@RCN.COM>
Subject:      Re: Fuel Pressure Question...
Comments: To: jesse johnson <jjmojo@BLAZENET.NET>
Content-Type: text/plain; charset=us-ascii; format=flowed

jesse johnson wrote:
> Hey All,
> In trying to find out my van's stumbling issues.. i rechecked the fuel
> pressure. Seems that i run at right around 30 psi during idle but if i
> rev the engine.. or hold the engine at say 3000 rpm or so.. the
> pressure will drop down to like 25 psi or so. Is this normal? Seems to
> me that it should remain at 29 no matter what the load. This might be
> why i am having stumbling on take off.. and is worse on hot days. Any
> thoughts on this? The fuel pump is original and has 170,000 miles on
> it.
> thanks all,
> jesse
> 89 carat
> 86 scirocco 310,000 miles and going
>

If the regulator is working  properly and there is enough pressure from
the pump, you should see the pressure rise when you suddenly open the
throttle or when you disconnect the vacuum line to the regulator.
   The Bentley procedure should help you determine whether the problem
is with the regulator or perhaps the pump or filter.

Larry A.