lil problem

[TwistedTunerz]

I have an 01 focus and when I push the gas it studders and the emisions light came on earlyer 2day and I was wondering if anyone had an idea on whats wrong...it has a lil over 25xxx miles so I dont think it would be a cat or anything big so I was wondering if it could just be as simple as a loose sensor or what...any help would b nice

[iamgod]

hi...could be a fouled o2 sensor...check your fuel filter too...if you have an aftermarket intake it could be a misread from your MAF...and how the hell do you have an 01 with only 25k on the odo?

[TwistedTunerz]

this one is my g/f's she got it used with 18x about 8-9 months ago...and now like a week ago it started to studder every once and a while but only in 1st gear and I didnt know if it was a fuel filter or maybe a sensor and then the other thing in the way back of my mind was maybe a stuffed cat. but now I'm thinkin its prob a o2 sensor cus if it was the fuel pump it would do it more often and not just in 1st gear.

[PBZX3]

If you can reproduce the problem on command, just take it to Ford, show them the what it does and let them deal with it under warranty.

[TwistedTunerz]

problem found...misfire on the #3 cly....bad plug or wire...most likely wire...have to c tomorrow cus I had to order it cus no where has them in stock.

[umdivx]

I have a '00 focus with 40K, I picked it up in September of last year with 32K.