So my truck runs really good for quite a while but every once in a while it starts running like crap. Usually either replacing the plugs or cleaning them up with a wire brush fixes it. This is happened 3-4 times now and I have barely put any miles on it. Just driving it around the farm every once in a while when I go home. Any thoughts on what would cause this? The last time it happened it ran great the day before and the next day it sounded like a cylinder was missing. I replaced the plugs and wires and it ran great again. Im using the AC Delco R45TS plugs each time. Would a different plug make a difference?
The plugs are all gaped correctly and there is no physical damage to them. Just a blackish coating on them. To me they look more carbon fouled than oil fouled. I dont have any pictures at the moment but I will be going home friday if pictures are needed. I checked compression a while back and the results can be seen below.
08-24-2015, 11:10 PM
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