I switched over to the NGK TR6 plugs and at idle it seems to run a little ruff. Kinda sounds like it misses a little bit. Once i get on the gas though its smooth and doesnt have any problems. Any ideas??

I checked the gap on all the plugs before installation

 

Definately sounds like a gap issue. Check all the plug wires make sure they are on correctly.

 

Yeah I checked all the gaps TWICE before I installed them. Pretty sure all the wires are on correctly because like I said it runs fine when on the throttle.

I dunno ill have to pull the plugs and check um. Damn not looking to pull demon # 8 again

 

Might have cracked a plug.

 

could have pulled a wire in 2 internally when u pulled them off

 

My car ran the same way when I put the TR6 in and I checked everything multiple times and thats just the way they are.

 

What is the "perfect gap" ?

 

I would love to hear the answer to this, Im sure it will vary with opinion.

 

Whatever their gapped at in the box, if its not perfect its ngk's fault lol.

 

Gap needs to be a 0.06. Some NGK's come as a 0.059, which is fine.