Reviewed By Tim G (Louisville, KY) Reviewed for a 2003 Lincoln Aviator —10/24/2012 12:22 PM
Was getting a rougher idle and random cylinder misses but not enough to throw a check engine light (CEL). Resulted in lower average MPG. Replaced all 8 ignition coils and made a huge difference even with 170K on the engine. Gas mileage back up to previous plus 5%.