Re: Replacing parts, improving performance - Saab 900 Bulletin Board - Saabnet.com
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Re: Replacing parts, improving performance
Posted by Simon S (more from Simon S) on Tue, 23 Jan 2018 20:49:37
In Reply to: Replacing parts, improving performance, ahanson [Profile/Gallery]
, Tue, 23 Jan 2018 18:49:14
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I can only guess that your old alternator wasn't producing enough voltage, so in that sense, yes, replacing it probably repaired your electrical system.
Low system voltage will directly affect the quality of the ignition spark, especially if plug-gap is on the wide end of what it's supposed to be, because the potential ignition spark voltage is ultimately a direct multiple of the battery/system voltage. A colder spark (lower voltage) is more prone to misfiring, and incomplete combustion, especially at wide open throttle and wide spark plug gaps.
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