Hello,

I've been trying to track down a slight engine vibration I'm having at at idle. There are no codes. The truck idles and runs great. There's just a slight vibration. Ive cleaned MAF, throttle body, and installed new air filter. Its not the motor mounts either..

I did a compression test and all cylinders were good. Upon inspecting, I found that one of the coil packs contact point, (where the spark plug wire to coil pack connects)was all grey/ash colored and the other two were still a nice shiny gold, brass color. The blue wire going to that contact point has a little rust inside as well.

All of the plugs looked fine, but I replaced them anyway. The other two coil packs and remaining plug wires were clean too.

The only that I did not do was replace the wires and/or the coil pack that had the gray color on contact point.


Can this be causing the slight vibration issue? Any feedback is greatly appreciated! Thank you

Attached Images

     

It’s possible. The arch can cause the rust color oxidation.


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