spark plug check

[DON 44]

I started tunning my truck today, it has a esp 30.5...The directions say 1 1/2 out low/2 out high/ then make full throttle runs for 30 seconds and check plug to make sure it's still a dark color.Then go down an 1/8 at a time and repeat this until the plug is a brown paper bag color.my question is are they talking about the little L shaped piece at the bottom of the plug or the bottom of the plug itself....I'm about an 1/8 over 1 1/2 on the high now and happy as hell with the way it's running,but the little L shaped piece on the plug is still a dark color not brown..It is a lighter color then when i started though.. I'm scared as hell to go below 1 1/2 though..I just need to know what part of the plug should be this brown color.

 

[Obeast44]

If the performance suits you run it as rich as you want. It can only help prolong the engines lifespan. When I check mine I check at the elctrode itself.

 

[DON 44]

thanks i think i'll stay where i'm at

 

[Sprint 77]

The white ceramic area surrounding the electrode in center is what will change to a light brown color.


Hope that helps.

 

[PISTOL PETE]

The white ceramic area surrounding the electrode in center is what will change to a light brown color.
Hope that helps.

i agree they mean the white part. same as tuning a carb in a car

 

[scaremonger]

Just wondering, what if the spark plug keeps coming loose?