my 2003 impala idle goes up and down.

Asked by Oct 16, 2016 at 02:14 PM about the 2003 Chevrolet Impala Base

Question type: Maintenance & Repair

Car's origional problem  was stalling at stop light,idle was kinda low .I
cleaned  intake  with carb cleaner replaced air filter,and idle control
sensor.The idle ,I feel is on low side- but- there's no adjustment to raise
idle.
Car ran good  for few weeks,  but now its doing it again -I hear idle  going
up and down when I slow down, parking car or at stop light . The  check
engine light is NOT on.

1 Answer

86,775

You may have to reset the ECM so it can relearn the idle settings after you have cleaned everything up, sometimes this can take up to 20 minutes to complete a relearn routine.

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