Still getting bad gas mileage

[k624ash]

I just changes my plugs, wires, distributor cap, rotor, ignition coil, and fuel filter. It didnt change my gas milage at all. I get about 20 mpg, maybe a little less. Whay else can i do to try and improve my gas mileage?

 

[1990TeGLs]

shift at really low rpms...haha...i dunno

 

[TegSox]

Is your air filter clean?
Tires properly inflated?
Are your rims really heavy?

 

[k624ash]

Is your air filter clean?
Tires properly inflated?
Are your rims really heavy?

I did put on 17s but they didnt change my gas mileage at all from the stock rims. They are all freshly filled to the right psi and the filter is a brand new k&n

 

[1329itr00]

do u have a lot of weight in your car like heavy shit in the trunk that would make a drastic difference or anything like that

 

[DailyDB8]

well if you have i/h/e that already kills more gas... so iono... get your fuel filter and injectors cleaned?

 

[k624ash]

I only have i/e, but i wouldnt think that would kill gas that much. I have a four door but shouldnt i still be getting over 30 mpg? I usualy dont have anything extra in the car.
how do i clean my injectors? and if that the problem wouldnt that mean less fuel was going in my engine? The car runs fine also

 

[k624ash]

wait a second, i dont know how this ended up in the forced induction forum. can a mod move it please?

 

[k624ash]

My catalytic converter is going bad, i just got inspected and it passed right on the mark. could this effect mileage? and if i put on a eliminator pipe would that help?

 

[TegSox]

Bolt on's don't give you worse gas mileage. If anything, they make it better, especially the intake.
If your cat's gone bad, maybe your running rich. Running rich would kill a cat and worsen your mileage. Maybe you have a bad O2 sensor. Does your exhaust stink like a 1970's muscle car? Mine did when I had a bad O2 and was running rich for a little bit.

 

[twlplague]

put some fuel injector cleaner in your gas tank next time you fill up and i would check that O2 sensor also!

 

[DailyDB8]

Bolt on's don't give you worse gas mileage. If anything, they make it better, especially the intake.
If your cat's gone bad, maybe your running rich. Running rich would kill a cat and worsen your mileage. Maybe you have a bad O2 sensor. Does your exhaust stink like a 1970's muscle car? Mine did when I had a bad O2 and was running rich for a little bit.

really? i always thought the header and the intake sucked up more gas...

 

[k624ash]

I think it is the o2, im gonna replace that next. my exhaust does smell like im running rich, or im just paranoid
is there any brand of o2 sensor i should look for? im not sure what to get

 

[Sirfallsalot243]

Any black residue on the back bumper? I dont know man, mines got a new fuel filter, timing belt, spark plugs, wires, dizzy, and my shop just reset the map sensor so it wasnt running rich- and Im only getting 26mpg. I have 16" rotas, 2 12" subs, spare and jack, AC and PS. I think mid 20's is about normal for any spirited driver. I normally shift at 3k, but take it up to 6500 sometimes too. I think your mileage may be about right.

 

[MoJoJoJo]

my mpg is kick ass cuz i have a daily driver =) a corolla :thumbs up