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Need help troubleshooting an engine issue: (vibration/miss at WOT, low rpm)

That is just a ceramic insulation. if the end of the plug wasn't moving around due to the fracture in the ceramic, there's a good chance that wasn't your problem, but i hope im wrong lol.
 
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Re: Need help troubleshooting an engine issue: (vibration/miss at WOT, low rpm)

captdistraction said:
That was it. Time to try out the gopro 240fps mode in the plugs' impending demise.

Awesome! Good news.
 

captdistraction

GrumpyRacer
1,785
1,327
Phoenix, Az
ArizonaGT said:
All that frustration from a cracked plug...oh well! Time to BURN RUBBER!!!!

Oh man did I ever. The tires are a bit more shaved now. It feels much smoother, no stumble, and so much more power. All from one tiny crack I missed on the first inspection. You can hardly even see it.
 

ArizonaBOSS

Because racecar.
Moderator
8,551
2,389
Arizona, USA
Either way I think we're in for a spin-fest. My stock P-Zeros are almost worthless right now, I hope these springs help.

You should get a dyno graph now that she is healthy!
 

Sesshomurai

Good news. Yeah, with a cracked plug the arc can sometimes leak out or dissipate.
 
Re: Need help troubleshooting an engine issue: (vibration/miss at WOT, low rpm)

captdistraction said:
That was it. Time to try out the gopro 240fps mode in the plugs' impending demise.

Thats great!

hint: i like in car videos better LOL
 
F.D. Sako said:
That is just a ceramic insulation. if the end of the plug wasn't moving around due to the fracture in the ceramic, there's a good chance that wasn't your problem, but i hope im wrong lol.

The ceramic is there to hold the spark in. Any crack and you get what the OP experienced. Airplane mechanics always throw a plug away that has been dropped even if it's only a few inches and shows no outward sign of damage.
 

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