ROUGH IDLE

  • Tiny
  • LBeckford
  • 1999 VOLVO S70
  • 140,000 MILES

Rough idle. ECM light on. Cleaned throttle & changed coils 1st still rough idle. Removed ECM. How can I test the ECM to verify that's the problem? I don't think it could be anything else at this point since everything else checks out fine. If I need new ECM & get it myself, will I have to have it programmed?

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Monday, January 28th, 2013 AT 10:47 PM

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  • Tiny
  • Blaze45
  • EXPERT
  • 384 POSTS

What code(s) is the ECM throwing? If you get a new/used ECM, it shouldn't have to be reprogrammed. Usually the ECM will tell you if it is toast by giving you a code.

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Monday, January 28th, 2013 AT 10:59 PM

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