Blake:

It "sounds" like it might be a partially clogged catalytic converter.  I can
hear it from here! :-)
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Tom Young                        '81 Vanagon
Lafayette, CA 94549          '82 Westfalia
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> ----- Original Message -----
> From: "Blake Heinlein" <blakeheinlein@HOTMAIL.COM>
> To: <vanagon@GERRY.VANAGON.COM>
> Sent: Thursday, October 17, 2002 1:00 PM
> Subject: Engine power loss (need help)
>
>
> Hi Everyone,
>
> I've been working on a mysterious power loss for the last week or so.  I
> have an '84 Westy Automatic 1.9L Digijet Injection.
>
> Here are they symptoms:
> - Idles fine
> - Accelerates at about 1/2 of normal rate
> - Makes a deep muffled roar when accelerating with load.  This is a new
> noise that I can't explain.  Sounds like I paid a lot of money for a new
> muffler.
> - Can't imitate noise while in Park.  If I rev the engine in park it
> doesn't make the noise.
>
>
> Diagnostics I have performed:
> - Compression test on all cylinders (good)
> - Removed sparkplugs and checked for spark (good)
> - Removed fuel injectors and checked for spray (good)
> - Checked fuel flow rate on fuel injectors (good)
> - Checked fuel pressure at inlet T (good)
> - Spark plug wire resistance (good)
> - New spark plugs
>
> Well, those are the clues, now I'm hoping that someone will have clues,
> suggestions, or other areas to check so I can diagnose this.  Thanks in
> advance to everyone.