08 Tahoe help!! Cylinder #1 misfire

[CaptainAmerica1]

Look like fake China knockoffs to me. Iridium should have the little pad on the ground electrode…

 

[OR VietVet]

You may have had some carbon tracking where I've circled in red:

View attachment 350362

That insulator looks like it has a small crack but may be just the angle, on the right side in the pic. The build up is because of piss poor quality or the misfire leaving deposits.

 

[BG1988]

That insulator looks like it has a small crack but may be just the angle, on the right side in the pic. The build up is because of piss poor quality or the misfire leaving deposits.

if you think that is bad my spark plug blew it self apart in cyc #1 luckily no damage

 

[OR VietVet]

Anything like what you experienced, @BG1988, is bad, real bad.

 

[BG1988]

Anything like what you experienced, @BG1988, is bad, real bad.

well it was a few chips off the plug

they told me this was a 100,000 mile plug


it only lasted 99,989 miles at failure