1999 Volvo S70 Rough Idle ECM Light On Cleaned Throttle And Changed Coils

1999 VOLVO S70
140,000 MILES
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LBECKFORD
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  • 1 POST
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?
Jan 28, 2013 at 10:47 PM
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BLAZE45
  • ✓ASE Certified Mechanic
  • 380 POSTS
  • ASE Certified Mechanic
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.
Jan 28, 2013 at 10:59 PM
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