Re: Misfire CEL is back - Saab 9-5 Bulletin Board - Saabnet.com
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Re: Misfire CEL is back
Posted by dtechakacheaptech [Email] (more from dtechakacheaptech) on Fri, 30 Jan 2015 10:37:49
In Reply to: Re: Misfire CEL is back, NCCaniac [Profile/Gallery]
, Fri, 30 Jan 2015 10:01:56
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Well you may be aware that Saab was forced to recall a bunch of cars years back to replace older DICs and install some sort of SW that gives more warning as to when a DIC is going south - but I'm assuming a piece of that involved lowering the misfire threshold which triggers a CEL , other things can cause misfires in an engine so I'm not sure it's always the DIC that needs replacement.
Not sure how Saab tracks misfires - most makes use variations in crankspeed but Saab has the combustion ionization measurement which might also come into play.
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