This is not a YJ specific question. But I spend most of my time on the the forum in the YJ tech section so I figured here is as good as any. Feel free to move this if there is a better section.
Yesterday I changed the plugs and wires on my wifes Ford Escort. It rolled over 139K with the origional plugs and wires. I already had some Bosch platinum 2 tipped plugs that I was going to use on the YJ before I read that they tend to go bad quickly in out engines.
Her car calls for a .054 gap, and these plugs claimed to be "pre gapped" but didn't say what they were gapped to. I checked them and they were set to .020. I figured that with the double tips it might equal out to .040 or something, but I wasn't sure. I just picked the middle ground and gapped them to .040 on both tips. But I have no idea if that is too wide or not wide enough. With the double tips does that equal .080 (the total width of both gaps combined) or does it just equal .040?
Also, this is what the plugs looked like. But I'm not very good at comparing them to the pictures in the repair manual. They all kind of look the same to me. Anything I should be noticing about these? They were gapped wider than my gapping tool would even go.