Howdy guys.. I have a problem that is leaving me a bit perplexed...
When I first got my '01 civic, I was making 34-36 mpg running 75-80 mpg. Then I got new wheels and tires. Went from the factory 14" steely to a 15inch. Tire size went from 185 70r14 to a 195 65r15. Not a big difference at all. I didn't see much (if any) loss in mileage when I made the change. My speedometer reading is off by up to 3 mph on the high end. My odometer is now off by 1 mile for every 40 miles driven. I compensated for that when calculating mileage.
As it stands, I just put 700 miles on my car, all hwy and I made 27mpg. It seems to have been slowly declining to the point that it just pisses me off now.
This car only has 112k miles. The engine has new plugs (10k miles ago), I have a very small oil leak at the valve cover, clean throttle body, new filter... The engine runs awesome. I'm not throwing any codes either.
I'm at a loss. I'm thinking I may need to replace the o2 sensors since I appear to be running rich... I could be wrong... I disconnected the battery and let the computer reset, checked my plugs (the look new still)... I can't find anything, at least not obvious. So now I'm frustrated...
Suggestions would be wonderful.
When I first got my '01 civic, I was making 34-36 mpg running 75-80 mpg. Then I got new wheels and tires. Went from the factory 14" steely to a 15inch. Tire size went from 185 70r14 to a 195 65r15. Not a big difference at all. I didn't see much (if any) loss in mileage when I made the change. My speedometer reading is off by up to 3 mph on the high end. My odometer is now off by 1 mile for every 40 miles driven. I compensated for that when calculating mileage.
As it stands, I just put 700 miles on my car, all hwy and I made 27mpg. It seems to have been slowly declining to the point that it just pisses me off now.
This car only has 112k miles. The engine has new plugs (10k miles ago), I have a very small oil leak at the valve cover, clean throttle body, new filter... The engine runs awesome. I'm not throwing any codes either.
I'm at a loss. I'm thinking I may need to replace the o2 sensors since I appear to be running rich... I could be wrong... I disconnected the battery and let the computer reset, checked my plugs (the look new still)... I can't find anything, at least not obvious. So now I'm frustrated...
Suggestions would be wonderful.