Originally Posted by Pete91
So at what point do I cut my plug up? When you guys say you may need to make 2-3 passes to get a reading are you cleaning the plugs then re using them? Or just repeat the process with no cleaning? I'm not sure if I understand how I will know if I have a visible fuel ring if the spark plug threads are covering the area where it is.
use a new plug on each run. I only replace one plug.
1. put new plug in before run. minimize time on plug.
2. after crossing 1/4 marker, kill engine, glide to a stop on return road.
pull the plug and replace with an old one.
3. return to the staging area and analyze.
I like to use an d/c -> a/c power inverter and a pliars/dremel w/cutting wheel to cut away threads. quick and clean.