if i replace the old spark plus for some new ones would it better my engines power performance?

Asked by Aug 16, 2014 at 09:53 PM about the 2004 GMC Envoy XL

Question type: Maintenance & Repair

2 Answers

107,375

Yes. Specially if the old ones are in poor shape. How many miles on vehicle?

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88,775

Right and if you do replaced them use at leadt double platinum plugs, iridiums are very good but expensive, and use AC plugs for the best performance.

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