I'm trying to trouble shoot something and I need to have my my spark plugs not fire one at a time to figure it out. Can I have my car running and just remove the spark plugs one at a time? Or does the car need to be off, then remove the spark plug, then start the car?

Thanks

 

Well, for future reference to anyone. You can. By that I mean, remove the boots as the car is running.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Booz &raquo;</TD></TR><TR><TD CLASS="quote">Well, for future reference to anyone. You can. By that I mean, remove the boots as the car is running.</TD></TR></TABLE>

Yes you can, it's called a cylinder drop test.