Car occasionally runs rough at start-up

2000 CADILLAC STS
135,000 MILES
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MACS
  • MEMBER
  • 1 POST
Almost like misfiring.smooths out after @ 5 minutes. What may be the cause? Have replaced coil packs, plugs, plug connectors(wires), and cam sensor to date.
Feb 16, 2012 at 11:00 PM
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RASMATAZ
  • ✓ASE Certified Mechanic
  • 75,992 POSTS
  • ASE Certified Mechanic
Clean out the idle air control valve and see what happens-start here
Feb 16, 2012 at 11:07 PM
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