Posted by Bob Bancroft on February 22, 2014 at 04:10:02 from (67.142.162.21):
One of the well below zero mornings my pickup was hesitant, and was skipping briefly after it started. 2004 Chev. 5.3L 106000 miles. I assume original plugs. So, maybe it's time for new plugs! I get the recommended ones (GM/Delco) from the local parts house. They are a different number than what's in my op. manual, and different from what's in the engine! Parts house says the numbers are changing constantly. So, I replace them. The plugs that were in the engine had a GM number as well as an NGK number printed on them! They look OK. Don't even look worn. But the gap is about .060". Aftermarket repair manual says .040" gap, years 2004 and later. The new plugs were .040". I'm wondering if the plugs in the truck were the wrong ones? Truck had about 40000 miles on it when I bought it.
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Today's Featured Article - Third Brush Generators - by Chris Pratt. While I love straightening sheet metal, cleaning, and painting old tractors, I use every excuse to avoid working on the on the electrics. I find the whole process sheer mystery. I have picked up and attempted to read every auto and farm electrics book with no improvement in the situation. They all seem to start with a chapter entitled "Theory of Electricity". After a few paragraphs I usually close the book and go back to banging out dents. A good friend and I were recently discussing our tractor electrical systems when he stated "I figure it all comes back to applying Ohms Law". At this point
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