[200q20v] Re: [audi20v] Rattling Distributor
b.m.benz at prodigy.net
Sat Jan 12 12:30:24 EST 2002
Wow! Missing a tooth and still in sinc? Doesn't take much torque to drive
> From: Wolff <wolff at turboquattro.com>
> Date: Sat, 12 Jan 2002 08:53:56 -0800
> To: 200q20v at audifans.com
> Cc: Phil Rose <pjrose at frontiernet.net>
> Subject: Re: [200q20v] Re: [audi20v] Rattling Distributor
>> BTW, Wolff, what led you to discover the cracked distributor gear in
>> the first place?
> Basically I had been chasing the boost problem for a long time. Replaced
> things like knock sensors (they had really cracked insulation), WGFV etc.
> With no luck. Even got a VAG com and couldn't learn anything from that. At
> one point Scott M suggested that a misalignment between the distributer and
> flywheel would result in one good boost run and then the car would have to
> be restarted to get boost back. This didn't match my symptoms very well, but
> it was a clue. What I had was normal great boost below 3000 rpm. When dead
> cold it also would boost up to high RPM's once or twice. This sort of
> matched Scott's suggestion. Of course I only went for high boost when cold
> as a part of my diagnostics since it's bad for engine wear. Once the engine
> was safely warm it would often get good boost for a few seconds as it went
> up to high rpms, but then it would drop off to 1.4 bar. Sometimes the boost
> would actually pick up again during a WOT situation after it had dropped
> off. It was very annoying.
> Anyway, I took the distributer cap off to inspect the rotor and it felt
> to me like there might be excessive rotational play so I pulled the
> distributer out. The gear was cracked in multiple places and was missing a
> tooth. A new distributer fixed the boost problem, but revealed a more subtle
> surging problem. That was simply an old oxs.
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