Spark plug number five misfiring

2008 CHEVROLET UPLANDER
150,000 MILES • 6 CYL • AUTOMATIC
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NICHOLAS FREEMAN
  • MEMBER
  • 1 POST
Spark plug number five is misfiring and the van is running real sluggish like it wants to cut off while on. I just want to know if you think the control module or coil has gone out? I changed spark plugs and wires then it started doing it there was no check engine lights on before he serviced the car
Mar 2, 2017 at 7:53 AM
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STRAILER
  • CAR REPAIR CONTRIBUTOR
  • 54,452 POSTS
Hey Nicholas,

I would remove the spark plug you installed and replace it with a new one, sometimes they can get cracked when installing them.

Please let me know.

Best, Ken





Mar 2, 2017 at 4:29 PM
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