Oil change, now idles poorly (beginner)

[andrewwynn]

DISA pin is steel I believe. If that fell in I would expect it would get caught in the valve seat it would cause an explosive back fire through the intake if the valve didn't seat. If it cleared the valve it would be in the cylinder and would rattle around something fierce. You could likely get a view into the cylinder with your camera to get an understanding of did the pin get in there.

Use a magnet on that debris and figure out if aluminum or steel. Either way it can cause bad seal on the valves and kill compression.

Were it me I would take out the plugs, inspect each cylinder, clean the mystery metal off all the valves and inspect them all for damage.

Once clean check all the cylinders for compression. If they check out put it back together and start knocking out errors


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