Crank but no start

2007 CHEVROLET TRAILBLAZER
237,000 MILES • 4.2L • 6 CYL • 2WD • AUTOMATIC
Avatar
AARONJ92
  • MEMBER
  • 9 POSTS
I was driving driving home one night and noticed my engine light flashing and also noticed the gas pedal kind of shaking and the vehicle hesitating as I gave it more gas. I pulled over and turned it off and got it towed home and next day it wouldn't start. We checked the spark plugs and right away the sixth plug looked like it was either melted off or came into contact with internal parts. We replaced the spark plugs and it is getting air, fuel and spark but now cranks but will not start. I added the only picture I took of the spark plug.
Dec 21, 2020 at 7:42 PM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.
Advertisement
Avatar
DANNY L
  • AUTOMOTIVE REPAIR CONTRIBUTOR
  • 5,648 POSTS
Hello, I'm Danny.

The picture did not come through. Can you please try again? We'll go from there after that. Also, what was the code number coming from the check engine light? Hope this helps and thanks for using 2CarPros.
Dec 21, 2020 at 8:40 PM
Advertisement
Avatar
AARONJ92
  • MEMBER
  • 9 POSTS
Well, crazy thing is engine light is on but no codes. I tried uploading the image again hopefully it worked.
Image (Click to enlarge)
Attached Media
Dec 21, 2020 at 8:58 PM
Avatar
DANNY L
  • AUTOMOTIVE REPAIR CONTRIBUTOR
  • 5,648 POSTS
Hello again.

Well, that's not good. I would pull the suspect plug to see if it's damaged again. There might be some debris in cylinder from the prior mangled plug causing damage to the pistons, rings, valve, and cylinder wall. You also might want to use a borescope to look in there to see the extent of the damage. Let us know what you find and get back to us. Hope this helps and thanks again for using 2CarPros.

Danny-
Dec 22, 2020 at 10:17 PM