Horrible Gas Mileage

[Guest]

Im getting very bad mileage, I wont have a number for a few more days but its bad, the needle moves over a 10mile trip to school. My exhaust smells rich. Not all the time but some times. Anyone have any ideas?

[V8 Killer]

Oxygen sensor?
Underinflated Tires?

When was the last time you had a tuneup?


What kind of car? Engine? Miles?

Give details....

[mike h]

my car got 7-8 MPG for about a tank after my fuel pump install. i thought i had done something wrong but it was just the computer adapting to the new pump.

[Guest]

Its a 2000 not a lot of miles 50K, Its got new plugs, fuel filter, wires, I reoiled the K&N, and new PCV vavlve.

[CM boyd]

Your Check Engine Light should be on... You have
an O2 sensor malfunction for sure. Take it to Autozone and hook up an OBDII diagnostics machine.
Its free!

[V8 Killer]

Originally posted by 2KThunder:
Its a 2000 not a lot of miles 50K, Its got new plugs, fuel filter, wires, I reoiled the K&N, and new PCV vavlve.

Run a bottle of Fuel System/Injector Cleaner..Check the Tire Pressure,it should be around 30-35 PSI.

[V8 Killer]

How bad is your mileage? Maybe your Gas Gauge is just iffy?

[Guest]

Im at 3/4 of a tank now, I reset the ODO when I filled it and ill top it off next time and divide the ODO by the gallons I put in it. but from what I have heard the 3/4 mark is really 1/2 and im at 100miles.

[V8 Killer]

Dont pay attention to the gas gauge...Do what you said about dividing the gallons and figuering out the MPG.

[Guest]

will do. What is the average for a v6 Camaro? I do have 3.73s and I drive maybe 12 miles to school then back home then the same distance to work with maybe 3-5 stop lights/signs in the way. Maybe my gears are killing me?

[V8 Killer]

Gears would be a factor but you shouldent be getting 10mpg..Thats like lamborghini mileage.

[Guest]

I should add to this, My idle can sometimes get rougher and I sometimes get a really nauseous gas smell in or from the exhaust of the car.

[V8 Killer]

Get it scanned for any error codes.Go to Autozone,they do it for free.

[Guest]

Theres no SES?

[V8 Killer]

Yeah well if there no SES then dont bother.