Bad Air/ Fuel mixture sensor warning for ALL Yaris owners

[eric81]

From my understanding, many a people have thrown pistons that way. But our cars are pretty low on the power, so you are probably right. Still, it was pretty bad in my engine. And it smoked BAD when I put the new plugs in. It is all nice now. I will check the plugs in about 2 or 3 more tanks. I will also post a pic of one of the bad plugs here tomorrow sometime. It is WAY burnt up. All black and stuff. My neighbor even felt bad for me.

[GeneW]

Originally Posted by eric81

From my understanding, many a people have thrown pistons that way. But our cars are pretty low on the power, so you are probably right. Still, it was pretty bad in my engine. And it smoked BAD when I put the new plugs in. It is all nice now. I will check the plugs in about 2 or 3 more tanks. I will also post a pic of one of the bad plugs here tomorrow sometime. It is WAY burnt up. All black and stuff. My neighbor even felt bad for me.

Black plugs aren't a big deal, unless they're oily. When you run so rich that the gas fumes dissolve the oil on the piston walls then it's a bad time. You gotta really really run rich to do that....

Now if you run super lean.... omg is that tough on the exhaust valves! I had a 73 Chevy Nova that had an orange glow under it from the exhaust manifolds glowing orange because of a lean mixture.

Gene