Oh no. Not plugs again. :-) - Saab Performance Bulletin Board - Saabnet.com
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Oh no. Not plugs again. :-)
Posted by pmr (more from pmr) on Fri, 10 Nov 2000 12:37:01
In Reply to: Viggen spark plugs, kestutip, Thu, 9 Nov 2000 13:41:35
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The stock plugs in the Viggen are NGK Platinum OEM plugs model PFR7H10. The ones installed in my Viggen were gapped at about 0.037 and were filthy when I pulled them at about 4,000 miles. They were running way too cold and were on their way to fouling.
I replaced with copper NGK BCPR6ES11 plugs gapped to 0.035. This is a hotter plug and the smaller gap seems to help smooth the engine and provide a more thorough combustion--eliminating the carbon deposits on the tailpipe that indicate an incomplete burning of the fuel in the combustion chamber.
The reduced gap is not officially recommended by Saab but my experience has been nothing but positive. I'd recommend trying the change to all Viggen owners.
pmr
'99 9-3 Viggen
'99 9-5 SE V6
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