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Does your car or truck have a flashing check engine light? Has it been getting worse gas mileage lately? It's possible those two symptoms are connected, and you can fix both with new spark plugs or ignition coils! In this video, Len explains how running rich can reduce fuel efficiency, and set off a check engine light, and what you can do to fix both!

🔧 List of tools used:
• Pocket Screwdriver
• Spark Plug Gapping Tool
• 5/16 Inch Spark Plug Socket
• Ratchet [ Ссылка ]
• Socket Driver
• Socket Extensions [ Ссылка ]
• Scan Tool [ Ссылка ]

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Check out our playlist:
Driveway Diagnostics!: [ Ссылка ]
Get Better Gas Mileage! Save Money with These Fuel Efficiency Tips!: [ Ссылка ]

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⚠ DISCLAIMER:
While 1A Auto strives to make the information provided in this video as accurate as possible, it makes no claims, promises, or guarantees about the accuracy, completeness or applicability of the content. No information contained in this video shall create any expressed or implied warranty or guarantee of any particular result. All do-it-yourself projects entail some risk. It is the sole responsibility of the viewer to assume this risk. 1A Auto is not responsible or liable for any loss damage (including, but not limited to, actual, consequential, or punitive), liability, claim, or any other injury or cause related to or resulting from any information posted in this video.

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