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Discussion Starter #1
I have a 2003 vector with an 04 2.0t engine in it. I originally had some rough idle issues that went away. But they did set off a check engine light which spits back a code for a bad upstream oxygen sensor (too lean i believe). I am experiencing poor acceleration, sub-par gas mileage, and this weird engine hesitation/back and forth feeling mostly when accelerating. I recently had both brake and coolant level lights come on and go away if that's at all relevant. I'm hoping someone can point me in the right direction as to how i can fix the problem.

Thank you!
 
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