Few S1 Issues

vendredi 14 novembre 2014

I've been having a couple of issues that I might know the issue for but would like some opinions first.



Currently it's been around 20* here and a new issue has started, this never happened when it was warm. When I idle for a couple minutes after the car is warmed up, I can faintly smell gas, don't know if it's raw or burnt, but this never happened when it was warm out. I thought to rule out running rich since the car is warmed up and didn't need the extra gas.



Second issue is that I recently took a couple trips to figure out my mpg because I thought it wasn't as high as it should be, and I think i'm right. Both times, I got around 17mpg. First time I went 85, second time I went 75 and just about the same mileage. It's always been low, in town I've always gotten around 15mpg.



Last issue is randomly, my car will stutter when trying to accelerate. Don't know how else to explain it other than that, I don't try and push it because i'm nervous of damaging the engine.



I've looked into it and my first guess is my front O2 sensor may be bad, any other options?



04, Manual, 58K, 6K on reman, changed all oils and ignition system at 57.




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