Hi,
I changed the spark plugs in my Ford Sigma engined 4/4 Sport today after at least 16,000 miles. I say at least as the car has now covered 31,000 miles and had 15,000 miles on it when I bought it but I've no idea if they have ever been changed before? It's a 2009 model.

The plugs came out with a "RED" tinge on them (see photos), the ceramic is red and parts of the metal electrode is red, does anyone know what that would signify?

I know black could be a rich mixture or burning oil, white could be a weak mixture or running hot and grey is ok.....BUT RED?

Any ideas? Sorry the photos aren't focused very well.
Thank you

[Linked Image] [Linked Image]

Last edited by Redfate; 10/03/22 07:52 PM.
Paul

2009 4/4 Sport in Red
2022 Harley Davidson FXLRS Low Rider S
1977 Triumph Stag