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In the old days (when leaded fuel was still around), a couple runs up & down the freeway would leave a burn pattern (color) that would indicate how everything is running, once the lead and other goodies were taken out, it takes a lot of miles (up to 1000) to "start" to get a visual read. But, those look real good....a slight light brown (good burining pattern, good A/F mixture), no pitting/spotting (timing is right), and the carbon residue inside the plug is minimal......meaning no oil is burning in the cylinders.
How many miles do you have on these plugs?
Member: Never trust a person over 40 who drives a Chevy club
Flatheads ain't so bad!
Certified backyard mechanic I & II
well now a new problem, as always. I installed a set of 69 jets, and now when the engine is running, I CANNOT get the float level to stay the same. If I turn the crew an 1/8th turn clockwise, the bowl runs dry, turn it 1/8th turn counterclockwise, the bowl floods. You can literally watch the gas just rise or fall doing either of the two turns and not stop until flooding or running dry. WTF. I installed jets two sizes bigger and now this bs?
Witty73: Thats not something you hear out of a 79 F 350 owner often...."dang, this thing sits too high!"
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