Focus Fanatics - View Single Post - 2003 ZTS - horrible gas mileage - 16.3mpg - HELP
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Old 08-28-2012, 03:48 PM   #9
Focus Enthusiast
Join Date: Nov 2011
Fan#: 91777
Location: Rockford, IL
What I Drive: 2003 Pitch Black ZTS Sedan

Posts: 217
FF Reputation: 1 PWGuy Good Standing Member
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Ok after some reading/research, I realized that when I did the spark plugs and spark plug wire change, I didn't remove the negative battery terminal, thus the computer may never have reset with the new plugs. I'm doing that now and cleaning off the oxidized battery terminal and post.

Will report back in a few days or so to see if it helps..
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