Date: 22 Jan 2003 15:30:36 GMT From: davehinznopsamcop.net Subject: Re: Iridium plug
Someone who looks an awful lot like Ichiro <ickaminopsamne.jp> wrote: > I have a '93 9000. > I'm thinking of trying Iridium plug(NGK) on my saab. > But saab shop said it isn't suitable for saab DI. > I cannot understand that reason. > If anybody has information please let me know. I can't explain specifically why it's not a good idea, but here is a link to an article which explains how the Saab engine management system uses the spark plug as a critical sensor to measure what is going on inside the combustion chambers. With the complexity of all of this, changing something as critical as the main sensors is probably a bad idea. http://www.vehicular.isy.liu.se/~larer/Projects/main.html This is a newer engine than your 9000 has, but the DI system was engineered for the specific spark plug that Saab says to use - changing to a different one would have no benefit at all. Dave Hinz
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