[20v] Coupe Quattro 20V Carbon Fouling Plugs
benswann at verizon.net
Sat Sep 12 06:40:23 PDT 2009
Definately sounds like BrettD has the most likely culprit pinned down!
Brett Fairbanks - you need to install a new pressure regulator. There are probably some
aftermarket adjustable units that will be better and cost less than stock. Others may
chime in as I don't have much experience with these - Yet.
From: Brett Dikeman [mailto:brett.dikeman at gmail.com]
Sent: Friday, September 11, 2009 6:52 PM
To: Ben Swann
Cc: brettfairbanks at verizon.net; 20v at audifans.com; quattro at audifans.com
Subject: Re: Coupe Quattro 20V Carbon Fouling Plugs
On Fri, Sep 11, 2009 at 6:29 PM, Ben Swann <benswann at verizon.net> wrote:
> Basically what you are saying is what I meant sort of - somehow the
> FPR fails and dumps too much fuel in. I can certainly see how a seal
> in the regulator fails or leaks in such a way as to dump fuel directly
> into the head, particularly if the injector seal allow for fuel to
> leak by or to pull fuel through the vacuum control port - which now as I recall is
how I think the failures I mentioned earlier were occurring.
I think the giveaway is that fuel is pooling in the IM. I can't think of how that could
possibly occur from a leaky injector, even if the Hitachi injectors are known to be
junk. And it's definitely not normal.
I think the leaky FPR was an issue on V8's as well, causing some fuel hydrolock in some
cases, which is a definite bummer on that engine...
Other Brett: after you get this straightened out, I definitely recommend running some
Seafoam through to clean out the combustion chambers etc...
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