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Q: Engine chugging

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Car drops idle and chugs in drive and idle normal when in neutral. Acceleration is slower than usual.

My car has 300000 miles.
My car has an automatic transmission.

A: A couple of common items can cause the idle...

A couple of common items can cause the idle to drop in drive. Most likely are:

  • the throttle position sensor
  • fuel pump
  • torque converter
  • transmission
  • the engine mounts

A qualified technician, such as one from YourMechanic, will be able to diagnose this fault and perform any repairs required.

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