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RPM problem

Tiny
SWEETDEE
  • MEMBER
  • 2004 CHRYSLER PACIFICA
  • 128,500 MILES
When I start the car, why does the RPM jump up & down?
Friday, May 18th, 2012 AT 5:02 AM

6 Replies

Tiny
SWEETDEE
  • MEMBER
  • 3 POSTS
Thanks, for your input.
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Friday, May 18th, 2012 AT 5:03 AM
Tiny
FIXITMR
  • MECHANIC
  • 9,990 POSTS
Does it go away?Any warning lights on.
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+1
Friday, May 18th, 2012 AT 5:26 AM
Tiny
FIXITMR
  • MECHANIC
  • 9,990 POSTS
It likely happens cause it's running too lean. This raises rpms, then computer tries to lower it. Cycle continues. May have vacuum leak or wrong input signals to computer fuel mix from TEMP or MAF sensor.
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Friday, May 18th, 2012 AT 5:29 AM
Tiny
CADIEMAN
  • MECHANIC
  • 3,544 POSTS
U will have to have the tps replaced
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Friday, May 18th, 2012 AT 6:25 AM
Tiny
SWEETDEE
  • MEMBER
  • 3 POSTS
No warning lights on. It only does it when the engine is cold.
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Friday, May 18th, 2012 AT 7:21 AM
Tiny
CADIEMAN
  • MECHANIC
  • 3,544 POSTS
U STILL NEED THE CODES READ BEFORE WE CAN HELP U. MOST PARTS STORES DO IT FOR FREE ty for using 2carpros.
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Friday, May 18th, 2012 AT 6:29 PM

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