I had my transmission flushed about two months ago. Since then my car runs at higher RPM’s at 70 mph (about 2600 RPM) and my mileage is down almost three mpg.

I know I shouldn’t pay any attention to EPA estimates, but others have reported getting between 17 mpg and 20 mpg in moderate city traffic. I am getting between 10 mpg and 12 mpg.

I recently replaced an Idle Air Control Valve, Serpentine belt, Exhaust Gas Recirculator Valve, and had my Catalytic Converters (all 3) checked. I don’t drive with a lead foot, I don’t start off the line too fast and I don’t come to sudden stops.

Anyway, I also ran a KOEO self test (uses 2-digit codes) and it came up with the left and right oxygen sensors detecting lean, and Fuel Pump Secondary Circuit Failure. That last one sounds bad, but then again I have one of those hidden fuel shut-off buttons inside the car on the floor next to the driver door, so it may have just saved into memory the fact that I used that.

When I took it to a muffler shop, thinking it was the cat converters causing a problem, they said that it’s not the cats and that they smell unburned gas. Maybe a leaky fuel pump or fuel line? Maybe the fuel injector? At this point, I have no idea, but I can’t afford to have bad gas mileage. Could someone help?

I am just wondering what is a mpg for a 2001 ford taurus? I just got the car and wondering what the mpg is for city and highway. Thanks for answering!

How many gallons and what is the AVG MPG?

Also the gas mileage has dropped to about 20 mpg and before it was getting around 35 mpg. The car sat for about a month because it had a flat tire so I was driving my other car, I don’t know if this could have anything to do with it. The check engine light also is on. Let me know if you need anymore info to help me with this question. Thanks
I’m pretty sure it has a 3.0 engine in it