giorgiolouis

Hi guys

I recently bought a Honda Civic 2001 because I was sick and tired of putting 20$ of gas a day in my Grand Vitara SUV.

I bought the Civic for really cheap and I changed a lot of parts on it..transmission, exhaust manifold, brakes etc...

In the first 100 km that I did with this car, it took like 14 liters of gas. Is this normal? What do you guys recommend? I checked my tires and they are fine. The only thing that I haven't checked yet is the spark plugs. Do you think that they make that much of a difference in fuel economy?

Thank you very much for the help, it is really appreciated!

rjones7755

Thats the equivalent of around 17 mpg....only way that might be normal is if you were driving like a maniac, i average around 30.

Civic_Nightmare

spark plugs, tire pressure, hopefully they didnt sell it for cheap because of an internal engine problem thats causing poor fuel economy...

giorgiolouis

Also, I noticed that the gas level never moves when I'm driving. It only goes down when I turn on the car essentially.

MindBomber

It's cold in Ottawa, so longer warm up times combined with winter blend gas affects fuel economy a bit, not that much though. Is your air filter good, cat functioning, no 02 sensor codes?

giorgiolouis

My exhaust manifold with the catalytic converter integrated in it has been changed like 1 week ago. We took one from a 03 low-mileage Civic. The O2 sensor has been changed too.

I haven't checked my air filter yet.

MindBomber

The air filter has a huge impact on mileage, pick one up asap, I would change the spark plugs as well, that's one of the first things I do after purchasing any used car. Reset the idle as well since you've done quite a bit of recent work, that might help a bit.

https://www.civicforums.com/forums/1...reset-ecu.html

Shift-E

My sister filled up 37 liters in my car today. It had only been driven 400 km :S My tires are a little big, so it's reading slow but not by that much!

Thats 10 km per liter. Not so good! Maybe once I change my filter it'll make a big difference..

giorgiolouis

34 L = 250 km. This problem is driving me crazy

rjones7755

Well you said it only seems to go down when the car has been sitting and then started, I would check for fuel leakage around the tank and lines etc.

giorgiolouis

I changed the front O2 sensor and I can now do 420 km on a full tank. Is this okay or still not enough?

SpeedDownZone

I used to get about 30mpg that's about 500km. was the air filter and spark plugs changed?

giorgiolouis

Yes, they are brand new!

lowlife9

if your going by the fuel gauge your probably way off hondas are notorious for having fuel gauge inaccuracies. but definitely do a tune up plugs,air filter,oil change.

Shift-E

Dont go by the needle. How many liters did you fill up after doing 420?