Is there away to make the engine run leaner in open loop mode (engine cold)

[Tommy 00GT]

Because my engine runs extremely rich when it is cold so it's horibbly killing my mileage. As I understand, the only reason an engine runs rich when cold is to quickly warm the catlytic coverters up, which I do not care for.

 

[autoXstang]

purchase a hand held tunner and play with the fuel curves?

 

[twogts4us]

In the time it takes to warm the engine, do you really feel you are burning that much extra fuel to make a noticable difference?
And how are you determining you are running "extremely rich when it's cold"?

 

[Tommy 00GT]

In the time it takes to warm the engine, do you really feel you are burning that much extra fuel to make a noticable difference?
And how are you determining you are running "extremely rich when it's cold"?

I can smell it pretty bad when the engine is cold. Smells almost like the time when I had no cats

 

[Gearbanger 101]

What's the mileage on your car? Maybe you're due for some new O2 sensors?