why is my gas milage down?

hey guys, my gas milage is down and my exhaust smells. i have a 2003 toyota tacoma trd and i cant figure out why.

 

check your tire pressure, air filter, plugs...

 

i hand the o2 sensor replaced a few months ago. it smells like its running rich or to lean

 

What kind of drop are we talking? 1-2? 3-5?

Fink

 

Maybe clean your MAF.

 

like 20 to 30 mpgs

 

I hope you mean 20-30 miles per TANK, cause if you mean 20-30 mpg's then your f**ked

 

MAF? is that the throttle body?

 

ya per tank

 

That's nothing to worry too much about - that could be as simple as bad quality gas, or different driving habits.

MAF = Mass Airflow Sensor

Fink

 

but why does the exhaust smell

 

maybe you have an exhaust leak...and the smell is getting into the cab easier

 

What is the smell? If it's a fuel smell - you may be running rich for some reason which would also cause a drop in efficiency.

Any recent maintenance/mods done?

Fink

 

might be an exhaust leak, might be a dirty MAF, might be bad gas, might be you driving uphill and not noticing it- theres a bajillion different reasons that MIGHT be the cause-
any good shops around?

 

it smells like fuel. no mods or fuel that recent. just the o2 sensor maby 6 months back

 

Check your exhaust for leaks, clean you Mass Airflow Sensor (they sell electric spray cleaner specifically for this), change your oil and air filter

 

ya i cleaned my throttle body a few months back air filter and change oil on the regular. ill check for exhaust leaks. thanks everybody

 

good luck man, keep us posted

 

Just remember that the MAF is not the throttle body - you should still clean it. It only takes a few minutes.

Let us know what you find out with the exhaust.

Fink

 

Im happy if I get 20 MPG!