Re: Fun with the DI cassette - Saab NG900 & OG9-3 Bulletin Board - Saabnet.com
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Re: Fun with the DI cassette
Posted by Jeremy R. [Email] (more from Jeremy R.) on Fri, 11 Oct 2002 13:19:58
In Reply to: Fun with the DI cassette, Jonathan, Fri, 11 Oct 2002 12:51:03
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Most GM cars now have distributorless ignition systems with no wires. Our 1997 Pontiac Grand Prix has a separate coil pack sitting on top of each spark plug. The DI cassette is just a fancier version of that type of system. The DI cassette also has a separate coil above each spark plug, but it also has circuitry to sense knock based on spark plug resistance(there's no knock sensor in a 900 turbo), and it lets them do other fancy things, like fire off a shower of sparks when the engine is turned off to eliminate carbon build-up. You know the downside to all of that.
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