2002 Chevy Trailblazer Chevy Truck Spark problem after chan

Tiny
HEATNUP
  • MEMBER
  • 2002 CHEVROLET TRAILBLAZER
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 135,000 MILES
A few weeks ago I changed the factory spark plugs on my 2002 Chevrolet Trailblazer. The truck has 135,000 miles on it and it has been running perfectly. The plugs were only changed as routine maintenance. I changed the original factory plugs with Bosch Platinum 2+ plugs, everything went fine.

Since changing those plugs, the engine misfires and sputters intermittently for up to 15 minutes after the truck is first started. A few odd things to note, everything is fine(as I notice) at idle(when not in gear) and when up to speed. The problem is only evident when the vehicle is in gear and if it is not moving and it goes away after 10 minutes or so of travel. The problem is most evident when I first back out of my driveway, and when I have to stop at the first first stoplight less than a mile away. After this, all is good.

Have any of you experienced such a thing? Can you provide any input or help?

I am starting to think, the plugs or just not good in my truck, but I have read elsewhere that this is ridiculous, and the guys at Autozone say the same. I did not keep the original plugs and haven't purchased any more plugs to try.I appreciate any input!
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Sunday, January 27th, 2008 AT 8:04 PM

3 Replies

Tiny
DENNYP
  • EXPERT
Never use bosch plugs in a GM vehicle. Autozone didn't design the vehicle, so they don't know. I have fixed countless running problems on late model GM vehicles by removing bosch plugs and putting in AC Delco. The vehicles are designed to run on AC Delco plugs only.
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Thursday, January 31st, 2008 AT 9:44 PM
Tiny
BULLCRAB
  • MEMBER
Don't use platinum in trailblazer book says not to
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Thursday, January 31st, 2008 AT 10:00 PM
Tiny
HEATNUP
  • MEMBER
I changed to ac delco and problems solved.
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Friday, February 1st, 2008 AT 11:06 AM

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