1992 Ford Bronco Rough idle and black smoke at start cold

1992 FORD BRONCO
180,000 MILES • V8 • 4WD • AUTOMATIC
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TEXASRC
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  • 1 POST
on a bronco 5.0 speed density e40d trans. 4wd at start up in cold condition (morning or after a long time park) present a heavy problem to keep runnig rough idle and black smoke came out the exaust till wamr up (about 15 minutes). already change MAP sensor, IAC sensor, ECT sensor, check for vacun leak. no HEGO
Apr 6, 2010 at 11:02 PM
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JACOBANDNICKOLAS
  • ✓ASE Certified Mechanic
  • 110,194 POSTS
  • ASE Certified Mechanic
The black smoke indicates it is running rich. Has the check engine light come on? Have you checked the temp switch?
Apr 20, 2010 at 10:30 AM
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