Re: DI = Direct Ignition, replaces spark plug wires. [+] - Saab NG900 & OG9-3 Bulletin Board - Saabnet.com
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Re: DI = Direct Ignition, replaces spark plug wires. [+]
Posted by Dean (more from Dean) on Wed, 4 Dec 2002 17:15:08
In Reply to: DI = Direct Ignition, replaces spark plug wires. [+], Saaber, Wed, 4 Dec 2002 13:07:35
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Seems to me that the electronics are failing with time and heat, not so often the oil filled coils. A semi conductor that fails to a short circuit can draw lots of current and overheat if the ignition is left on. The smell of the burnt epoxy potting comptound is easy to recognize.
I had a spear red DI in my 95SET, now I will someday need a spare black DI for my 9-5.
The DI is quite particular with what plugs are used. These engines do not have knock sensors. The DI is used to measure the conditions in the combustion chamber to avoid knocking, so the plugs are the eyes and ears for this.
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