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Date: 9 May 2002 13:11:15 GMT
From: davehinznopsamcop.net
Subject: Re: My dealer hasn't got a clue, can you help? ('97 9000 Aero, Manual)
Someone who looks an awful lot like Andrew Hookins <andrew.hookinsnopsamamnopsamodata.co.uk> wrote:
> Lee Marshalls,
> My finger in the air guess is a pressure leak causing the ECU
> to either get an incorrect manifold pressure indication, or
> something preventing the wastegate working properly.
One would hope they've checked for leaks in the components and ducts, but
yes, false air would cause all sorts of odd problems. Given all
they've changed, though, well I'd hope that's unlikely this far
in to the exercise.
> Dave Hinz,
> Have a look here to see how the DI cartridge / spark plugs are
> used sense what is going on in the combustion chamber:
> http://www.vehicular.isy.liu.se/~larer/Projects/main.html
Cool, thanks. It's even in English, which makes it a bit easier
to read.
> Interestingly this control scheme can actually actually adapt to
> changes in air humidity because it can 'measure' when peak
> pressure occurs.
I've just done a very cursory read, but am printing it out for
study. A question - is this how it's done in, say, the T7 ECU?
My initial thought is that I wonder if this means water injection
would be more, or less, effective using this sort of an engine
management system.
Thanks for the link, Andy.
Dave Hinz
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