Low boost problems even with clamped lower WG hose

[Phil Haag]

First do a quick check on the underside of your Michlein man hose.  I have
had these develop a crack, and you just pump your boost right out.







>From: Marc Swanson <mswanson at sonitrol.net>
>To: Eyvind Spangen <eyvind.spangen at c2i.net>
>CC: quattro at audifans.com
>Subject: Re: Low boost problems even with clamped lower WG hose
>Date: 27 Feb 2003 09:13:10 -0500
>
> > I installed a boost gauge yesterday in my '88 100TQ. It only got 0.3
> > bar, but it is not chipped, and I guess the gauge (cheap) can be a bit
> > inaccurate. But I tried clamping the lower wastegate hose, and the
> > boost stayed the same. According to the SJM site, it should hit the
> > overboost cutout when clamping the lower hose..
> > What can be the cause? I'm thinking bad/worn turbo, it has got 240k
> > miles.. (380kkm)
>
>Could be a worn turbo, especially given the mileage.
>
>Also, the wastegate could be stuck slightly open, thus only allowing
>some of the exhaust gasses through the turbo.  Take off the wastegate
>cap and check the wastegate to make sure you can slide the valve up and
>down.
>
>
>Best Regards
>
>--
>----------------------------------
>Marc Swanson, Software Engineer
>Sonitrol Communications Corp.
>Hartford, CT
>
>Email: mswanson at sonitrol.net
>Phone: (860) 616-7036
>Pager: (860) 948-6713
>  Cell: (603) 512-1267
>   Fax: (860) 616-7589
>----------------------------------


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