Jump to content
  • Welcome to SAU Community

    Welcome to SAU Community, like most online communities you must register to view or post in our community, but don't worry this is a simple free process that requires minimal information for you to signup. Be apart of SAU Community by signing in or creating an account.

    • Start new topics and reply to others
    • Subscribe to topics and forums to get email updates
    • Get your own profile page, build reputation and make new friends
    • Send personal messages to other members.
    • See fewer ads!

    Consider joining our newsletter for the latest content updates

    Click here to register


sky_2.0T

Spark Plug Color?

Recommended Posts

hey guys my car studders at low rpm before boost, checked my spark plugs and the top of the electrodes looks like sandpaper gritt. I do extensive idling when on the way to work with a stock rb20det except for intake/exhaust. Half of the plug is brown/half white-ish colored. I heard a rumble when revving it, could be cas bearing, but it sort of went away. getting new sparkies soon , but they def. did not look like this before, looks unhealthy. leaking out?

my camera sucks so be patient , just look at the half and half pictures to get an idea.

post-38689-1184106485_thumb.jpg

post-38689-1184106681_thumb.jpg

Link to post
Share on other sites

white spark plug tips means its burning oil mate. could be your rings or your turbo.

brown is the ideal colour that you want from it.

Link to post
Share on other sites

its a strong running motor, i just changed spark plugs , and now it breaks up at all rpms slightly, i used delco double platinum since thats the only ones i could find today, cross referenced with pfr5a-11 .... i am using the silvia non turbo stock fuel pump with 120 km on it..... maybe it is on its way out? the plugs look overheated

Link to post
Share on other sites
white spark plug tips means its burning oil mate. could be your rings or your turbo.

brown is the ideal colour that you want from it.

is it always the case it could be rings or turbo? is it anything else it could be?

cheers

Link to post
Share on other sites

Plugs look fine to me.

Here in Adelaide we don't see extended idling so my plugs have always come out clean as a whistle.

If you want to take a better pic place the sparkys on a table and then use the macro function of your camera.

I've found 6's up to around 240rwkwish to be ok; over that they show as running too hot.

I've since changed to 7's and the plugs have a much nicer tan colour instead of the porcelin coming out near shiny looking white after a few hard runs on the dyno.

Link to post
Share on other sites

yep th plugs are fine. i just changed my plugs last weekend and they were similar color to yours. its just running rich, normal.

gotta be careful if the plugs are white... means its going towards a stoich/lean mixture..... stoich is good but means hotter temps which is why the plugs would be white

i use #7 plugs on mine.. people say i should use 6 but 7 is fine.

Link to post
Share on other sites

Got the car back from the dyno, had a look at the spark plugs. Brand new bcpr7es were used. 

What do you guys reckon about the color of the tips 

#1, 2 & 3 plugs

20201015_184907.thumb.jpg.4a2dfd98b2fa5d35650c627b22960971.jpg

#4, 5 & 6 plugs

20201015_191109.thumb.jpg.6ab6a88533e3f98def526f56ec4d2e0d.jpg

Thanks 🙏

Link to post
Share on other sites

f**k knows. You can't read plugs that have been used in varying conditions. To get a proper read needs to be brand bew plugs, wide open pull, shut off straight away then read.

  • Thanks 1
Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now



×
×
  • Create New...