Poor fuel economy

2013 TOYOTA COROLLA
100,000 MILES • 1.6L • 4 CYL • 2WD • AUTOMATIC
Avatar
KHALIDDVD
  • MEMBER
  • 56 POSTS
i have fuel economy less than before.
Ignition plug changed, tires pressure okay and no (check engine) activated. how can I start to diagnose the problem (what the plan sequence)?
Mar 1, 2019 at 4:21 AM
Advertisement
Avatar
ASEMASTER6371
  • ✓ASE Certified Mechanic
  • 52,796 POSTS
  • ASE Certified Mechanic
Good morning,

Driving habits are the most common reason for fuel mileage.

Other possibilities.

1. Alignment and tires.

2. Transmission. If the shift point is off, you will use more fuel.

3. Tire size. If you changed tire size, it will affect mileage.

4. Filters. Make sure fuel, air and all filters are clean.

Roy
Mar 1, 2019 at 7:26 AM
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.
Ask a Free Question
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.