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Old 10-29-2019, 07:44 AM   #1
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Join Date: Oct 2017
Location: NC Mountains
Posts: 391
Default 4 Blackened Spark Plugs?

What would cause the plugs to become covered in black crap so fast? If you've read my " Zenith Troubles" thread you know that my plugs were at least part of my problem with the engine running correctly. After cleaning them the engine ran great for what little time I ran it. One thing I noticed as soon as it cranked was how quite it was after I cleaned the plugs versus before I cleaned them. The engine sounded like the back ground sound to a ships engine in a movie while idling. It was super quite after I cleaned the plugs.

I had the engine running maybe 15 minutes total. I did drive it on the hiway about a half a mile and noticed the engine missing as I was in third gear gaining speed. I returned to the shop and parked it and yesterday decided to look at the plugs again. They were already getting covered in the black crap. I've not driven it enough yet to know if it uses/burns oil. I looked into each cylinder and it was black but didn't look wet. The back two cylinders looked like there was more carbon than the fron two.

What do I need to check and what order?

Thanks in advance.
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