Ive been having a problem with the car running rich. I was thinking I could have a leaky injector so I pulled of the fuel rail and injectors together from the manifold. The #7 injector was missing an 0-ring? I know it didnt fall of when i took it out, i was very careful and the injecotor had some grime where the o-ring would be.

So i got a new one and installed it. Think this could have been my running rich problem? I noticed my #7 plug was cleanner then the rest on the left side as well. The extra air in #7 must have been leaning out the cyclinder. THe the 02 was correctong for it and adding fuel to the whole left side. Make sence?

 

I guess it makes sense, Lucky you wernt leaking fuel out of there..