why can't I always accelerate from a slower speed. on 2001 Ford Explorer

idles hard, wants to stall when I come to a stop and recently will not speed up when I try to accelerate. the check engine light has been on for months after adding a gas line anti-freeze.

by in Spring Valley, IL on March 27, 2014
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1 answer
ANSWER by , March 27, 2014
Most likely a lean code, if you can get it scanned and give us the code, it would be easier to guide you to the fix.