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

115,855

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

1 of 1 people found this helpful.
104,085

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.

1 of 1 people found this helpful.

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