1993 Nissan Altima rough and irratic idle

132,000 MILES • 4 CYL • FWD • AUTOMATIC
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FRYINGBACON
  • MEMBER
  • 1 POST
my car when in drive at idle will drop from about a smooth felling 900 rpm to a really rough with a lot of vibration at the steering whell and down to about 600 rpm and with the a/c on it will help smooth it out sometimes...also when in traffic and engine not at high rpms my ac will stop blowin cold air but still blows air...help will be greatly apperciated......
Sep 11, 2010 at 2:03 AM
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RASMATAZ
  • ✓Experienced Mechanic
  • 75,988 POSTS
Clean out the idle air control valve/auxiliary air control valve.
Sep 11, 2010 at 2:06 AM
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