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My SUV runs great but will only go 30mph then it.

Tiny
ANONYMOUS
  • MEMBER
  • 2005 ISUZU ASCENDER
  • 90,000 MILES
My SUV runs great but will only go 30mph then it sputters and stays at that speed, what cuold be the problem?
Saturday, March 30th, 2013 AT 3:01 PM

2 Replies

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Sounds like a clogged cat converter. Have the backpressure checked.

Roy
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Saturday, March 30th, 2013 AT 3:09 PM
Tiny
FREEMBA
  • MECHANIC
  • 1,152 POSTS
Is the check engine light on? If so, have the codes read at autozone or somewhere like that. Post the codes here for further assistance.
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Saturday, March 30th, 2013 AT 3:16 PM

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