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
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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)
Jun 26, 2023 at 6:11 PM
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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.