2002 Mitsubishi Galant Fuel Economy

2002 MITSUBISHI GALANT
140,000 MILES • 4 CYL • 2WD • AUTOMATIC
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ACITORE
  • MEMBER
  • 1 POST
I just had my Bank1 Catalytic Converter and O2 sensor replaced, along with an ignition coil. The engine was misfiring before this.

Now that it runs perfectly, I've gone from getting 29.6 Miles/Gallon to getting 23.4 Miles/Gallon.

Could the Cat converter have anything to do with this?
Jun 22, 2008 at 5:25 AM
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BLACKOP555
  • ✓Experienced Mechanic
  • 10,386 POSTS
improper o2 sensor installed? harness damaged during o2 sensor removal and installation?

exhaust leak.
Jun 22, 2008 at 6:22 AM
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