2000 Cadillac El Dorado engine misfiring, SES light flashing

2000 CADILLAC ELDORADO
90,000 MILES • AUTOMATIC
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ALFOWL
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  • 4 POSTS
My 2000 eldorado esc has been driving rough. Engine misfiring, SES light flashing, but only while accelerating, stays lit while idle. Drives fine for about.20 minutes, but once engine is heated, begins to misfire. Had this same issue 2 years ago, replaced plugs, boots, and front ignition coil. Problem was fixed. this time around, we replaced the plugs, boots, and rear ignition coil, but the problem remains. Any ideas on what it Could be?
Mar 23, 2015 at 6:52 AM
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JACOBANDNICKOLAS
  • ✓Experienced Mechanic
  • 110,244 POSTS
Was the computer scanned to determine which cylinders are misfiring?
Mar 23, 2015 at 10:03 PM
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ALFOWL
  • MEMBER
  • 4 POSTS
No, tonight we are going to have it put on the computer, so hopefully we will know more then!
Mar 23, 2015 at 10:05 PM
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JACOBANDNICKOLAS
  • ✓Experienced Mechanic
  • 110,244 POSTS
Let me know what you find. To me, it sounds like a bad coil. You may have just replaced the wrong ones.
Mar 23, 2015 at 10:19 PM
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