2001 nissan altima problem

ok car runs great untill i come to a stop, then it idles up and down and sometimes stalls i have like 50,000 miles on it always keep up on matinance. i installed an after market k & n air filter on it ( a high performance one) can this be causing the problem because my friend ahs same car and has same filter but his car werks fine? i have tried adjusting idle, change fuel filter, distributor, spark plugs and wires. what would the problem be

-- boks

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Take it to your local shop and have them hook up a scanner,OBDII scanner to pull the error codes. Sounds like a sensor problem, idle air control(IAC) mass air sensor or some other

-- thecrazycanuck

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