Plug/jetting Gurus: Read my plugs please?

[twinrat]

you need to hold it at maxium throttle in top gear for as long as possible to get a reliable reading ,even 10 seconds of idle will destroy your reading.Now when i say you need a colder plug it is  not  because your engine is running hot ,it is about the ability of the spark plug to transfer heat through to the cylinder head  and reduce fouling on the spark plug under certain conditions.read this http://auto.howstuffworks.com/ignition-system2.htm   there is a ton of info on the net.
your engine has to be in a healthy condition to give decent spark plug readings that mean any thing.things like good compression ,valves not tight, no air leaks in carburettor,no vac leaks,other wise its just a waste of time.

[xunedeinx]

Got my new set of DPR8EA-9

Stock, one plug was perfect, right before .035, the other one was almost .04, so I made it exactly the same as the other one.

So, out of the box, their not always perfect.

Also changed the idle screw from 2.5 to 3.5, made a WORLD of difference as to the popping on decel, now it won't do it at all unless I bring it to 10k, than drop off the throttle under load, and its only for about 1k rpms.

But, I may have a new problem...

Just to check them, I ran each cylinder independently... without a plug basically.

The right seemed ok, the left seemed a lot more sluggish and deeper pitched (exhaust note) than the right cylinder.

Shes at 14k miles, maybe time for valves?

I have yet to do a compression test, but if it is valves, than it won't do any good anyway.