Before I had a tune up, I got 32 miles a gallon highway. After the tune up I'm only getting 24 miles a gallon highway. What can the problem be?
Jun 26, 2023 at 10:46 AM
Poor fuel mileage after a tune up was done?
2017 HYUNDAI ELANTRA
MYRA SANDOVAL
- MEMBER
- 1 POST
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STRAILER
- ✓ASE Certified Mechanic
- 54,832 POSTS
It sounds like they installed the wrong spark plugs or the gap is off. Here is a guide to help you do the job correctly and instructions for your car in the images below.
https://www.2carpros.com/articles/how-to-change-spark-plugs
Spark plug:
Type ELR9IQP9+
Gap 0.8 - 0.9 mm (0.0314 - 0.0354 in.)
Check out the images (below). Please let us know if you need anything else to get the problem fixed.
https://www.2carpros.com/articles/how-to-change-spark-plugs
Spark plug:
Type ELR9IQP9+
Gap 0.8 - 0.9 mm (0.0314 - 0.0354 in.)
Check out the images (below). Please let us know if you need anything else to get the problem fixed.
Images (Click to enlarge)
Professional Diagram for 2CarPros Members
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Click here to log in and view diagram.
Professional Diagram for 2CarPros Members
Click here to log in and view diagram.
Click here to log in and view diagram.
Professional Diagram for 2CarPros Members
Click here to log in and view diagram.
Click here to log in and view diagram.
Professional Diagram for 2CarPros Members
Click here to log in and view diagram.
Click here to log in and view diagram.
Professional Diagram for 2CarPros Members
Click here to log in and view diagram.
Click here to log in and view diagram.
Jun 26, 2023 at 6:11 PM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.