Date: Sun, 16 Jan 2005 18:52:37 GMT
From: "James Sweet" <jamessweetnospamail.com>
Subject: Re: Opened DI Casette - For those interested


> > I pulled my NG900 DI apart too and found the same thing... everything > epoxied into place. I have had two other cars (Nissans) with DI > systems and they had individual coils so I was thinking of just > swapping out the Saab individual units from new to old as the old ones > went bad. However, the epoxy prevents any such plans. > > FWIW: On the other engines where there are individual DI coils they > often have a separate ignition module which I think Saab has embedded > in the epoxy. There is a little electronic stuff on top of the each > coil, usually similarly sealed in tight. These cars also have coils go > bad at 60K miles likes Saabs - pretty much all of them have the same > problems. The ignition modules rarely go. That leads me to believe > that it's the coil itself going bad... or something else in that > direct area. > If the coil itself fails it looks like they could be swapped out between modules with the DI cassettes, it's certainly not unheard of for insulation to break down and arc over on HV transformers, though testing them on the bench to know which ones are bad could be an issue, and the arcing could certainly kill the electronics driving them.

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