the flyin' scotsman

During an oil change this week I also gave the engine a once over inspecting all levels/ filters and a few spark plugs.

I noticed that the plug colours a on the greyish side; car driven prior to the check WFO in 2nd to 6k rpm. Engine is stock with new oil, good compression and the intake system was rebuilt last winter with the injectors cleaned and balanced.

Lizard928

I tend to get alittle high speed glazing on mine from time to time,, but slightly greyish is nothing to worry about.

the flyin' scotsman

Do you every see the ideal light tan colour?

Light grey plug colour suggests lean but I dont have an a/f meter................Roger?

heinrich

Malcolm, never. With modern fuels I have honestly never seen a light tan colour.

the flyin' scotsman

You've reminded me H that yes modern non-lead fuels will give off different hues..........wanted to be sure it just wasn't me; thx

Lizard928

hmm I thought that the slightly tan/red hue was high speed glazing, I will have to look that up again.

I just checked mine yesterday and have a tan colouring on them with a tinge of reddish.

no doubt

Here's a great thread on reading your spark plugs, but you may have to "register" to see all of the pictures: http://www.ferrarichat.com/forum/sho...d.php?t=121401