Low boost problems even with clamped lower WG hose

[Marc Swanson]

> 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

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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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