2004 Chevy Suburban spark plug missing

2004 CHEVROLET SUBURBAN
115,500 MILES • V8 • 2WD • AUTOMATIC
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06BOBBER
  • MEMBER
  • 2 POSTS
just changed spark plugs due to mileage. after changing them engine started to miss like it had a foweled plug. I triple checked everthing and instalition and plugs seem fine. was wondering if i caused a problem by unpluging #1 coil during instalation while battery was still hooked up.
Apr 9, 2008 at 2:19 PM
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MERLIN2021
  • AUTOMOTIVE REPAIR CONTRIBUTOR
  • 17,250 POSTS
Did you check for spark from that coil? Proceed as shown in this video!
https://www.2carpros.com/car_repair_video/test_engine_ignition_system.htm
Apr 9, 2008 at 2:24 PM
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06BOBBER
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  • 2 POSTS
yes it has spark.
Apr 9, 2008 at 2:45 PM
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MERLIN2021
  • AUTOMOTIVE REPAIR CONTRIBUTOR
  • 17,250 POSTS
First thing you need to do is have the codes read, Autozone does it free, Post the results with the code number(s). Even if the service engine light is not on, there should be freeze frame data stored.
If it won't make it to Autozone, buy a cheap scanner, they can be had for 30-40 dollars, a good investment, since they cover all cars sold in the USA from 96 on...
Apr 9, 2008 at 3:04 PM