Poor running 3B

[Tony Hoffman]

IF you are tasting gas in that line, and you can continue sucking,
then yes, the FPR is bad. It's got a rubber diaphram and a spring.
That diaphram seals the fuel side from the vacuum side. Have you
started the engine without that hose connected? Sounds like it's
sucking straight fuel in there, which will definately cause a rich
idle. In fact, it will be rich all the time, but especially noticable
at idle, where that quantity of fuel is a much greater percentage
higher than what's actually called for.

There is a procedure in the Bentley on how to test the MAF. Don't have
that volume, so I can't give specifics :(

Tony

On Fri, Nov 19, 2010 at 7:38 PM, HJS <group44_us at yahoo.com> wrote:
> Im still having NO luck with this issue. I checked all my hoses, pipes, lines
> etc. This thing still runs insanely rich when idling. Im at a loss.
>
>
> The only things left in question:
> -MAF.  It SEEMS Ok to the look but who knows. I havent seen any specifics on how
> to test it, even on SJM's page. If you have any pointers, Im all ears.
>
> -FPR.  If I disconnect the vacuum line to it and suck on it, I taste gas (not
> liquid, but a strong gas taste) which I dont think I should. I can also keep
> sucking where I would think it should stop after a bit, right? Doesnt that mean
> the diaphragm might be torn? not sure. Other than thost things, Im totally
> totally stumped. I have a friend coming over tomorrow with vag-com, hopefully
> that will shed some light.