Re: Boost problems, redux.

[Thomas Tornblom <Thomas.Tornblom@nexus.comm.se>]

> Date: Fri, 2 Sep 94 16:08:17 EDT
> From: glen@mass.smc.com (Glen Powell)
> Reply-To: quattro@swiss.ans.net
> X-Charset: LATIN1
> X-Char-Esc: 29
> 
> 
> Hmmmm. If manifold pressure is applied to aid the force of the spring,
> and there were a malfunction, boost would go higher, manifold pressure
> would go higher, the WG would be held closed longer by the increased
> pressure, boost would go higher still, and we have a runaway condition.
> 
> This doesn't sound right.....
> 
> -glen
> 
> 

Well, if the computer malfunctions in such a way that the valve is
held open constantly, it would shut down the ignition when the
pressure becomes to high. If the malfunction is so severe that it wont
notice the high pressure, it would probably not handle ignition either
and the engine would shut down.

You can easily check where the hoses are connected, and check with a
simple lamp connected in parallel with the valve how it works.

Thomas