Fluctuating rpms

2007 CHRYSLER TOWN AND COUNTRY
70,000 MILES • 3.0L • V6 • 2WD • AUTOMATIC
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TOMMY THOMAS
  • MEMBER
  • 2 POSTS
When the motor is in idle, transmission in park, and the motor cold, is the motor suppose to speed up and slow down, back and forth, when gas is applied? When motor warms up it stops. Is this normal?
Feb 24, 2018 at 8:33 AM
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ASEMASTER6371
  • CAR REPAIR CONTRIBUTOR
  • 52,796 POSTS
Good morning

No, it is not normal at all. It should stay nice and smooth.

Is the check engine light on?

When was it last serviced?

Roy
Feb 24, 2018 at 8:51 AM
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TOMMY THOMAS
  • MEMBER
  • 2 POSTS
Yes, the engine light is on. I put my code reader on it, and it indicated a low vacuum leak. Could this be the cause? Could that be it or could I just need a fuel cap replacement?
Feb 24, 2018 at 9:39 AM
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ASEMASTER6371
  • CAR REPAIR CONTRIBUTOR
  • 52,796 POSTS
What is the code number?

A vacuum leak will definitely cause this issue.

Roy
Feb 24, 2018 at 9:41 AM