How do these plugs look to you guys?

[rennch]

Just doing an ignition tune up. They look normal, though they have yellow on the tips. Am I running lean?

[T77911S]

looks like they have a LOT of miles on them.

they look pretty consistant except #4. might be a tad lean. maybe an air leak. but again, a lot of miles. other than that, dont see signs of oil, so that is good. i would not worry.

pull the new plugs after a 100 miels or so, then after about 500 miles.
i would do check after a full red line run and shut it down before it idles.

on the new plugs, look at the ground strap.. there should be a line kid of like on #3 and #6. thats your timing.
what the heat range on the plugs?

[DWeg1998]

Insulator leg brown/rust color looks normal. Yellowing tips could be caused by various additives.

http://www.ngksparkplugs.com/tech_support/spark_plugs/faqs/faqread.asp

@ $2.75 per shiny new ones are definately recommended

[tobluforu]

That's one hell of a gap, MSD?

[rennch]

Yes, MSD. Just replaced all with new Bosch/Beru stuff. Didn't make much of a difference performancewise, sadly. But I haven't driven it yet... just idled.

[ganun]

Fyi, lean is pure white, all of it. Sorry no pic of the burned valves either.

[rennch]

I gotta say...the toughest part of the whole thing was getting the plug wire onto #2. I could NOT find the hole. (That's what he said...) :P

[T77911S]

that is a big gap. i would close it up some.

you wont see a "performance" increase with a MSD unless it is fixing something that was below par. not to say the MSD is bad, i have one in my 930. but for a stock engine or even with some mods, you wont gain any HP over the bosch unit. both are very good units.
close that gap.

[rennch]

the gap is about .063 or so. What do you recommend?

[redstrosekNic]

I run my 2.7 with NGKs @ .032. Seems to run great

[rennch]

With MSD? It looks like Steve Weiner recommends .045-.050, so I might give that a shot.

[T77911S]

that would be fine.

your never said what heat range the plugs were