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Date: Sat, 22 Jan 2005 04:37:13 GMT
From: "James Sweet" <jamessweetnospamail.com>
Subject: Re: Opened DI Casette - For those interested


"Colin Stamp" <colinnospamp.plus.com> wrote in message news:ptp2v05a8ctakebdjnefnod091sh2hs5fmnospamcom... > On Thu, 20 Jan 2005 11:41:34 PST, mojavegnospamveg.iwvisp.com (Everett > M. Greene) wrote: > > >After monitoring this thread for a week or so, I'm beginning > >to wonder if the DI is a case of suboptimization. The > >distributor, HV coil, and sparkplug wires have been eliminated, > >but these were relatively inexpensive items and rarely failed. > >These were replaced by multiple expensive items which are > >just as prone to failure if not more so. > > There's roughly the same number of components in a coil-on-plug system > as in a comparable dizzy setup. They both have roughly the same > electronics. Coil-on-plug has more coils, but dizzy systems have the > dizzy itself and the HT leads. I wouldn't be surprised if those two > items don't hold first and second place for the component that's > brought the most petrol engines to a standstill. Getting rid of those > two is *really* worth doing. > I remember canceling journeys in my first car (a '77 Mini) just > because it was raining. I used to buy WD-40 in great big cans, and I > wasn't the only one either. In winter it would sell like hot cakes. > (It probably still does but I wouldn't know - I dropped out of the > market when I got my first car with coil-on-plug ignition.) I really > don't miss any of that. Mind-you, I might look after the system a bit > better if I had one these days ;o) > > Cheers, > > Colin. Not saying it can't happen, but I've never once had a distributor or plug wire(s) fail in a manner that suddenly makes the car undriveable. I've had one carbon button break off inside a distributor cap and make the engine run poorly, I've also had a plug wire fail and do the same, but in either case I could drive the car home. I like the idea of DI, but the particular system Saab uses appears to have a glaring weak spot, it simply shouldn't fail in a way that renders the car completely undriveable in the typical lifespan of the car. A few may fail here and there, but from what I gather this is something that *will* fail, and I maintain that that's unnacceptable.

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