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What are possible causes for intermittent rough idle and******** while engine is cold?

Tiny
BANNONJAMES
  • MEMBER
  • 2003 KIA SPECTRA
  • 135,000 MILES
Sometimes once or twice a week, sometimes once a month when the car is first started it has very rough idle and while driving it will***** and the check engine light blinks on and off. After the car warms up (less than 10 miles)it runs fine and engine light stays off. Don't know how to diagnose because it isn't consistant and it never happens when I can get to a shop. Also, when the engine light goes off will the code that caused the blinking be stored or is it gone?
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Friday, November 25th, 2011 AT 8:35 PM

1 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
CEL/SES On

What you need to do here is have the computer scanned for OBD2 codes, there's a problem within the engine management system that caused the light to turn On, this is your starting point of diagnosis
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Friday, November 25th, 2011 AT 10:35 PM

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