Check the Fuel Pressure Regulator.

Paul Borghese
----- Original Message -----
From: Tom Moritz <tmoritz@BMI.NET>
Newsgroups: groupstudy.vanagon
Sent: Saturday, May 13, 2000 5:18 PM
Subject: Hesitation with acceleration

> I would appreciate some assistance in diagnosing a problem we are having
> with our 90 Westy.  We recently had the engine rebuilt due to a broken
> cylinder head stud.  Then engine runs great except for a hesitation when
> accelerating.  The problem is most evident when pulling away from a stop
> light or stop sign.  I sometimes feel it when I'm accelerating in traffic.
>
> Here's a decription of my perception of the problem.  I'm stopped at a
stop
> light and it turns green.  I'm a gentle driver so I depress the
accelerator
> peddle 1/8-1/4 full travel.  The car just rolls forward as though I've
> released the brakes but not given any gas.  Then 1-1.5 seconds later the
> car will start to respond to the accelerator input.  Full accelerator
input
> results in normal rapid vehicle acceleration for that pedal position.
>
> I have the following suspicions and would appreciate any feed back on
these
> or other possible causes:
>
> 1) My airflow meter is failing and the vechicle is accelerating when the
O2
> sensor corrects the mixture.
>
> 2) The bypass on the airflow meter is not set correctly.
>
> 3) I have a bad temp sensor (though this problem appears to be independent
> of operating temperature.
>
> 4) Others?
>
> Thank you for any assistance,
>
> Tom Moritz
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> *                                       *
> *       From the computer of:   *
> *           Tom Moritz          *
> *                                       *
> ***********************************
> ---