Question about 1997 GMC Sonoma
Fouling plugs 2,4 and 6 - have tried replacing wires, O2 sensor, and cam sensor - any suggestions
1) Identify the foweling type
2) "Worn piston rings or valve seals may allow too much oil to leak into the combustion chamber, leading to oil fouling." This could be your case http://www.ngksparkplugs.com/techinfo/spark_plugs/faq/faqfouled.asp?nav=31200&country=US
More reading http://www.autotap.com/sparkplugs/ppc_spark_plugs_replace.html
Posted on Jun 26, 2009
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Posted on Jan 02, 2017
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