What does the flash code 3-4 mean for 1991 Mercury Capri

Tiny
JONATHON
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  • 1991 MERCURY CAPRI
  • 150,000 MILES
What does the flash code 3-4 mean for 1991 mercury capri
Sunday, February 26th, 2012 AT 6:09 PM

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Tiny
DRCRANKNWRENCH
  • MECHANIC
  • 3,380 POSTS
That translates to "Idle Speed Control". More than likely the Idle Air Control Valve, IACV, has failed. It is generally located on the intake manifold near the throttle body.
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Sunday, February 26th, 2012 AT 6:18 PM

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