2005 Chevy Malibu Engine idles down to quick

90,000 MILES • 6 CYL • FWD • AUTOMATIC
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KMS
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  • 1 POST
If you are driving about 40 mph and take your foot off the accelerator the car idles down immediately to about 700rpm, when you accelerate again the engine revs up about 500 rpm and engages the transmission. Not so smooth. The car engine runs fine, the transmission engages from a stop and shifts fine. I have changed the transmission fluid and filter recently but did not notice much change. Its not noticeable at a higher speed. What might cause that??
Sep 6, 2010 at 8:13 AM
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RASMATAZ
  • ✓Experienced Mechanic
  • 75,988 POSTS
Check and test the throttle position, accelerator pedal position sensor and mass airflow sensors-
Sep 6, 2010 at 9:49 AM
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