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Lose of speed

Tiny
CASSYGIRL
  • MEMBER
  • 2005 KIA SEDONA
  • 6 CYL
  • AUTOMATIC
  • 100,210 MILES
2005 SEDONA LOSES SPEED GOING UP A HILL. We have changed the plugs the wires and coils and also the catalyic converter.
Wednesday, December 29th, 2010 AT 4:01 PM

5 Replies

Tiny
RNDARROW
  • MEMBER
  • 15 POSTS
Is it down shifting on hills or staying in the high gear?
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Wednesday, December 29th, 2010 AT 4:41 PM
Tiny
CASSYGIRL
  • MEMBER
  • 3 POSTS
It is down shifting but will not gain speed.
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Wednesday, December 29th, 2010 AT 5:41 PM
Tiny
RNDARROW
  • MEMBER
  • 15 POSTS
Try cleaning the mass air flow sensor. Sometimes those will get dirty and cause a lose in power. Any parts store carries the cleaner, on the the back of the can it will give you the directions on how to clean it.
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Wednesday, December 29th, 2010 AT 9:18 PM
Tiny
CASSYGIRL
  • MEMBER
  • 3 POSTS
Thank u so much! I will try that. Will let u know if it works.
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Thursday, December 30th, 2010 AT 2:07 AM
Tiny
ERNEST CLARK
  • MECHANIC
  • 1,730 POSTS
First, you didn't mention if you have a check engine light on. If you do, always begin by having the computer scanned for codes. This will eliminate the guessing.

Second, it is NEVER a good idea to chase down a problem by replacing parts. It's too expensive and almost never works. Only if you're lucky.

When you suspect a part, test it. If it test bad, then replace it.
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Thursday, February 10th, 2011 AT 1:08 PM

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